Kinds of categorical propositions – UGC NET Question

Statements A, B, C and D correctly describe the four standard categorical forms, while E is false. A-propositions are indeed “All S are P”, E-propositions “No S are P”, I-propositions “Some S are P” and O-propositions “Some S are not P”. I-propositions are particular, not universal, so they do not express universal affirmation. Therefore the set of all and only true statements is A, B, C, D only.

Option A:
Option A is correct because it includes exactly those four statements that match the standard AEIO scheme and excludes E, which wrongly labels an I-proposition as universal. This option fully represents textbook terminology used in UGC NET preparation.

Option B:
Option B is incorrect since it omits D, leaving out the correct form of the O-proposition, and so A, B, C only does not list all true statements. It is therefore incomplete with respect to the question stem.

Option C:
Option C is wrong because it drops C, the correct form of the I-proposition, and thus A, B, D only fails to include all valid categorical types. It also still excludes nothing false beyond E, so it does not capture the full set of accurate statements.

Option D:
Option D is incorrect as it includes E along with B, C and D, thereby treating the false statement about I-propositions as if it were true. B, C, D, E only therefore mixes correct and incorrect information and cannot be accepted.