UGC NET Questions (Paper – 1)

A is correct as a valid categorical syllogism uses exactly three distinct terms: major, minor and middle. B is true because the middle term must be distributed at least once to connect the extremes properly. C is correct since two negative premises provide no positive linkage, and D is true because two particular premises cannot logically support a universal conclusion. E is false because these are necessary but not sufficient conditions; a syllogism can meet them yet still be invalid for other reasons. Hence A, B, C and D only are correct.

Option A:
Option A omits D and thus fails to mention the important constraint on drawing universal conclusions from particular premises. While A, B and C are true, the omission of D makes the set incomplete.

Option B:
Option B ignores A, so it does not mention the three-term requirement; although B, C and D are true, this omission leaves out a central structural rule for syllogisms.

Option C:
Option C drops B and therefore fails to highlight the distribution requirement of the middle term, which is crucial for testing validity. Even with A, C and D present, missing B leaves the account incomplete.

Option D:
Option D is correct because it collects all the true structural rules while excluding E, which overstates their sufficiency. This matches how NET questions test necessary conditions for syllogistic validity.

Statements A, B and C express standard rules from traditional syllogistic logic. A is correct because a categorical syllogism uses three and only three terms, each appearing in specific roles. B is correct since failure to distribute the middle term at least once leads to the fallacy of undistributed middle. C is also true because with two negative premises there is no logical basis to relate the subject and predicate terms, so no conclusion follows. Statement D is false because valid syllogisms cannot have both premises negative and the conclusion negative simultaneously, so only A, B and C form the correct set.

Option A:
Option A is incomplete as it includes only A and B but omits C, which is an important rule prohibiting valid conclusions from two negative premises. Without C, the characterisation of valid and invalid syllogisms is not complete. This makes the option unsuitable for the correct answer.

Option B:
Option B is correct because it brings together all the true statements about term count, middle-term distribution and the restriction on negative premises. It also implicitly excludes the incorrect idea in D that a valid syllogism may have all three statements negative. This matches the logical rules examined in NET questions.

Option C:
Option C is incorrect because it includes D, which falsely allows a configuration with both negative premises and a negative conclusion, while omitting B. Losing the distribution condition on the middle term and accepting a wrong rule about negativity makes the option invalid.

Option D:
Option D is wrong because it pairs B with D, treating the clearly false D as if it were correct and leaving out A and C. The combination therefore mixes truth with error and fails to capture the overall structure of valid categorical syllogisms.