Peer group interaction in a classroom helps in

Peer group interaction most helps learners realise their own misunderstandings through the exchange of ideas.

Explaining and debating with peers exposes gaps and errors in one's own thinking.

This reflects the social, collaborative view of learning stressed by Vygotsky.

Concept understanding can also grow, but it is a broader outcome, not the distinctive gain of peer interaction.

Rapport building is a social benefit, not the cognitive correction that peer interaction provides.

Questioning is a technique used within interaction, not the outcome the interaction yields.