Explanation : The assertion, 'Classroom communication
is pre-decided by social and institutional
demands', is true. Classroom transaction
at any class level is planned in accordance
with the curriculum framework which
lays down the guidelines for educational
institutions about what to teach and how,
in accordance with the Education Policy
of the nation. The education policy is aims
at educating its learner-citizens in keeping
with the social demands of the nation.
Institutions vary in the quality and level
of resources, they make available for the
teaching-learning process; so, institutional
demands also influence and pre-decide
classroom communication.
The reason for this is that educative actions
must be positively oriented and must also
aim at positive outcomes so that learners
acquire knowledge that is significant to
fu1fil social demands. Hence, (R) is the
correct reason for (A).