Bar graph and histogram features – UGC NET Question

Statements A, B, C and D correctly describe bar graphs and histograms. A states the proportional representation of values by bar lengths. B is true because bar graphs are suited to comparing discrete categories such as years or regions. C accurately distinguishes histograms as bar-like representations of continuous class intervals with no gaps. D is correct since in practice examinees sometimes estimate values when scale divisions are not fine. E is false because both vertical and horizontal bar graphs are acceptable ways to present data. Therefore, A, B, C and D only are correct.

Option A:
Option A is correct because it brings together the essential properties and uses of bar graphs and histograms and leaves out E, which wrongly forbids horizontal bars. It reflects the standard data interpretation conventions in NET examinations.

Option B:
Option B is incomplete because it omits D, failing to mention the realistic need for approximation when reading from coarse scales, which is a practical aspect of graph use. This omission makes the option less comprehensive.

Option C:
Option C is incorrect as it includes only B, C and D and omits A, so it never states the basic proportionality between bar length and value. Without A, the central representational feature of bar graphs is missing.

Option D:
Option D is wrong because it contains E, which incorrectly bans horizontal bar charts, and drops B, so it both introduces an error and loses a key comparative property of bar graphs.