In the Parliament of India, the purpose of an adjournment motion is

to allow a discussion on a definite matter of urgent public importance.
to let opposition members collect information from the ministers.
to allow a reduction of specific amount in demand for grant.
to postpone the proceedings to check the inappropriate or violent behaviour on the part of some members.

Answer

to allow a discussion on a definite matter of urgent public importance.

(a) An adjournment motion is moved to draw the House's attention to a definite matter of urgent public importance by interrupting normal business. Verdict: Correct.
(b) Collecting information from ministers is mainly through Question Hour, calling attention, etc., not the purpose of an adjournment motion. Verdict: Incorrect.
(c) Reduction of a specific amount in a demand for grant is a cut motion, not an adjournment motion. Verdict: Incorrect.
(d) Postponing proceedings due to disorder is done by the Presiding Officer adjourning the House, not through an adjournment motion. Verdict: Incorrect.