Explanation:

Explanation:
The president from time to time summons each House of Parliament to meet. But, the maximum gap between two sessions of Parliament cannot be more than six months. In other words, the Parliament should meet at least twice a year. A session of Parliament consists of many meetings. Each meeting of a day consists of two sittings, that is, a morning sitting from 11 am to 1 pm and post-lunch sitting from 2 pm to 6 pm. A sitting of Parliament can be terminated by adjournment or adjournment sine die or prorogation or dissolution (in the case of the Lok Sabha). An adjournment suspends the work in a sitting for a specified time, which
may be hours, days or weeks.
Pair 1 is not correct: Prorogation not only terminates a sitting but also a session of the House. It is done by the president of India. It also does not affect the bills or any other business pending before the House. However, all pending notices (other than those for introducing bills) lapse on prorogation and fresh notices have to be given for the next session. In Britain, prorogation brings to an end all bills or any other business pending before the House.
Pair 2 is correct: Adjournment sine die means terminating a sitting of Parliament for an indefinite period. In other words, when the House is adjourned without naming a day for reassembly, it is called adjournment sine die. The power of adjournment as well as
adjournment sine die lies with the presiding officer of the House. He can also call a sitting of the House before the date or time to which it has been adjourned or at any time after the House has been adjourned sine die.
Pair 3 is not correct: Adjournment only terminates a sitting and not a session of the House. It is done by presiding officer of the House. It does not affect the bills or any other business pending before the House and the same can be resumed when the House meets again.