UGC NET Questions (Paper – 1)

The precautionary principle acknowledges that environmental systems are complex and scientific understanding is often incomplete. It states that where potential harm is serious or irreversible, waiting for perfect certainty can result in unacceptable damage. Decision-makers should therefore take reasonable, cost-effective preventive measures even when some scientific questions remain open.

Option A:
Option A is incorrect because it demands complete scientific certainty before acting, which is exactly the approach the precautionary principle argues against.

Option B:
Option B is correct because it closely matches widely accepted formulations of the precautionary principle used in international environmental agreements.

Option C:
Option C is incorrect as it gives priority only to economic growth and sidelines environmental risks, contrary to the principle’s insistence on protecting the environment under uncertainty.

Option D:
Option D is incorrect since the precautionary approach responds to uncertainty by urging caution and preventive action, not by ignoring environmental concerns.

Statements A, C and D are correct and together describe the major steps and principles guiding environmental risk assessment and management. Hazard identification and exposure assessment are core elements, risk management legitimately includes broader social and economic considerations and precautionary measures are accepted when there is uncertainty about serious harm. Statements B and E are incorrect because risk assessment involves assumptions and value choices, and it is applied not only to chemicals but also to other hazards such as radiation and physical infrastructure risks. Therefore, the combination A, C and D only is the correct answer.

Option A:
Option A is incorrect because it omits D, which is an important statement about the role of the precautionary approach in situations of scientific uncertainty. Without D, the answer does not fully reflect contemporary environmental risk governance.

Option B:
Option B is incorrect as it adds E, which wrongly restricts risk assessment to chemical hazards. Modern practice applies risk assessment frameworks across multiple hazard types, so including E makes the combination factually wrong.

Option C:
Option C is incorrect since it includes statement B, which claims risk assessment is entirely objective and free from value judgements. In reality, choices about endpoints, safety factors and acceptable risk levels involve normative judgments, so accepting B contradicts academic and policy discussions.

Option D:
Option D is correct because it brings together A, C and D, the three statements that align with accepted risk assessment and management practices, and excludes the two clearly false statements. It acknowledges both the technical and value-laden aspects of environmental risk governance.

Option E is incorrect as it includes B, D and E, of which only D is correct. B and E each misrepresent important aspects of risk assessment’s scope and nature, so the combination cannot be accepted.

Option F is incorrect because it groups C, D and E, again including E, which narrows risk assessment to chemicals only. Even though C and D are correct, the presence of E makes this option inconsistent with the broader view of environmental risk assessment.

The precautionary principle states that lack of full scientific certainty should not be used as a reason to postpone cost effective measures to prevent environmental degradation when there is a threat of serious or irreversible damage. The stem highlights preventive action under uncertainty,which captures this idea precisely. Therefore the correct answer is the precautionary principle.

Option A:
Sustainable use refers to using resources in a way that does not compromise their availability for future generations. While related to long term thinking,it does not explicitly address acting in advance of full certainty as described in the question.

Option B:
Efficiency focuses on achieving objectives with minimal input or cost. It is an important economic consideration but does not capture the risk averse stance embedded in the precautionary principle.

Option C:
The precautionary principle shifts the burden of proof toward proponents of potentially harmful activities,encouraging safer alternatives. This feature aligns with the stem’s emphasis on avoiding serious harm even when knowledge is incomplete.

Option D:
Equity concerns fairness in the distribution of benefits and burdens,such as intergenerational and intragenerational justice. While equity considerations can support precaution,they are not the specific principle described in the stem.