Zero Hour' in the working of the Indian Parliament means

1. A

   The first hour of the Session

   The first hour of a sitting is Question Hour, not Zero Hour. Calling the opening hour Zero Hour is the usual mix-up.

2. B

   When privilege motion are accepted

   Privilege motions can be raised when the House allows, but that procedure is not the definition of Zero Hour.

3. C

   Hour before question hour

   The hour before Question Hour is not a named ‘Zero Hour’ in Indian parliamentary practice; Question Hour itself opens the day.

4. D

   The time immediately following the question hour

   Zero Hour is the time immediately after Question Hour, when members raise matters without prior notice (an Indian innovation, not in the rule book as a formal hour). That is the official key.

Summary. Official key is (d) the time immediately following Question Hour. Question Hour is the first hour; Zero Hour is the unlisted interlude that follows. Privilege and ‘hour before questions’ are other devices. Honour the stored letter (d).