Indian Politics
In Indian parliamentary functioning, "Zero Hour" means-

Time before question hour
Acceptance of privilege motion
First hour of the session
Time immediately following question hour

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Indian Politics
The function of Protem Speaker is to-

Officiate as Speaker when a Speaker is unlikely to be elected
Swearing in members and hold charge till a regular Speaker is elected
Check if the election certificates of members are in order
Conduct the Proceedings of the House in the absence of the Speaker

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