The correct answer is option 1: within one month. According to the Constitution of India, when the President declares a national emergency, the proclamation must be placed before each house of Parliament for approval within one month. As per Article 352 of the Constitution, the President can proclaim emergency in case of war, external aggression, or armed rebellion. The proclamation of emergency grants the central government with additional powers to tackle the emergency situation. However, if the proclamation is not approved by both houses of Parliament within one month, it ceases to be in effect. This provision ensures that the declaration of a national emergency is subject to parliamentary scrutiny and accountability. Therefore, the correct period for placing the proclamation before Parliament is within one month.