Detailed Solution:
The correct answer is “1 month”.
The proclamation of emergency must be approved by both the houses of parliament within one month from the date of its issue.
However, if the proclamation of emergency is issued at a time when the Lok Sabha has been dissolved or the dissolution takes place during the period of one month without approving the proclamation, then the proclamation survives until 30 days from the first sitting of Lok Sabha after its reconstitution, provided the Rajya Sabha has in the meantime approved it.
If approved by both the houses, the Emergency continues for 6 months and can be extended to an indefinite period with an approval of the Parliament for every six months.
Every resolution approving the proclamation of emergency or its continuance must be passed by either House of Parliament by a special majority. Special Majority refers to a majority of 2/3rd members present and voting supported by over 50% of the total strength of the House.