Approval by both Houses of Parliament for a National Emergency Proclamation is needed within:

The correct option is 1 month.

Explanation:

Under Article 352 of the Constitution of India, a proclamation of National Emergency must be approved by both Houses of Parliament (the Lok Sabha and the Rajya Sabha) within 1 month from the date of its issue.

Originally, the time limit for Parliamentary approval was 2 months. However, the 44th Constitutional Amendment Act of 1978 reduced this period from two months to one month to prevent any potential misuse of power.

Once approved by both Houses of Parliament, the National Emergency continues for six months and can be extended indefinitely for an unlimited period with the approval of Parliament every six months.