The correct answer is option 2 - For six months.

A Presidential Ordinance is an executive decision made by the President of a country without the need for parliamentary approval. According to Article 123 of the Indian Constitution, a Presidential Ordinance has a limited duration and can remain in force for a maximum of six months. This allows the President to urgently address important matters that cannot wait for the parliament to convene and pass a regular law. After the six-month period, the ordinance automatically expires unless it is approved by both houses of the parliament within that time frame. If the parliament fails to do so, the ordinance becomes invalid. Hence, a Presidential Ordinance does not remain in force indefinitely but has a specific duration of six months.