What is meant by conference?

The best fit is A. A conference is a formal meeting held for discussion and exchange of views, usually among people with a shared professional or subject interest. The defining feature is deliberation, which is what option A captures.

• B is too generic. Any crowd or gathering fits it, so it does not define the term.
• C describes an informal, social get-together. A conference is structured and purposeful, so this is wrong.
• D describes an audience or a lecture hall. A conference may include a keynote speaker, but the speaker is not what makes it a conference. Discussion is the core.

The core concept here is the precise dictionary sense of a word, which matters in UPPSC English and comprehension questions where close synonyms are offered. For Mains, the idea links to how institutions like the Parliament and inter-state councils function through deliberative meetings.

Trap: Aspirants pick D because they picture a speaker addressing a large gathering. Check whether the option describes the purpose of the meeting or only its audience.