UGC NET Questions (Paper – 1)

Statements A, C, D and E describe key features of three-set Venn diagrams. A is correct because three sets generate 2³ = 8 possible membership combinations. C is true as the triple intersection appears where all three circles overlap. D correctly states that the union collects elements belonging to at least one of the sets. E is also correct in survey contexts where the region outside all circles stands for those having none of the properties. B is false since “A only” must exclude elements that also belong to B or C, so the correct combination is A, C, D and E only.

Option A:
Option A is correct because it gathers all the true statements and excludes B, which misdefines the “A only” region by including members of B and C. It captures the structure and interpretation of three-set Venn diagrams used in survey and counting questions.

Option B:
Option B is incomplete as it omits E, ignoring the important role of the outside region for respondents with none of the attributes. Without E, the account of all regions relevant to survey interpretation is not comprehensive.

Option C:
Option C is incorrect because it includes B along with A, C and D, thereby accepting the wrong description of “A only”. Even one incorrect statement within the combination makes the whole option invalid.

Option D:
Option D is wrong as it features B and therefore carries forward the same misunderstanding of exclusive regions, while also omitting A, which states the basic partitioning into eight regions. This mix of omission and error makes the option unsuitable.