Definition of proposition – UGC NET Question

A proposition is a declarative statement that is capable of being true or false. Logic is primarily concerned with the relations among such truth-evaluable statements. Propositions serve as the basic units in arguments, premises and conclusions. Hence the kind of sentence described in the stem is called a proposition.

Option A:
Option A, question, seeks information and is not normally assigned a truth value of true or false. Interrogative sentences therefore fall outside the primary domain of propositional logic. Thus question is not the correct term here.

Option B:
Option B, command, aims to direct action and likewise is not truth-evaluable in the ordinary sense. Imperative sentences cannot be meaningfully labelled true or false. Therefore command does not match the description in the question.

Option C:
Option C, exclamation, expresses emotion or attitude rather than stating a fact. Exclamatory sentences are also not treated as propositions with determinate truth values. Hence exclamation is not the appropriate label in this context.

Option D:
Option D correctly names proposition as the sort of statement that can be either true or false. Such statements provide the content for logical analysis and argument evaluation. Therefore proposition is the best answer.