Step 1: Understanding the Parliamentary Terms
The question asks for the specific parliamentary term used when a sitting of a House is terminated without appointing a day for its reassembly.
Step 2: Defining the Terms
(A) Adjournment: This is a short recess or suspension of the sitting of a House for a specified period, which can be hours, days, or weeks. The time and date of the next meeting are specified.
(B) Adjournment sine die: This is a Latin phrase meaning "without a day". In the parliamentary context, it means to adjourn the House without fixing a date for the next sitting. This effectively terminates the session, and the House can only be called back by the President (prorogation usually follows).
(C) Dissolution: This ends the life of the entire House (only applicable to the Lok Sabha). It is a more permanent termination, and a new House must be constituted through a general election.
(D) Closure Motion: This is a motion moved by a member to cut short the debate on a matter and put it to an immediate vote. It is a procedural tool, not a termination of a sitting.
Step 3: Final Answer
Terminating a sitting of Parliament for an indefinite period is called Adjournment sine die. Therefore, option (B) is the correct answer.