The correct answer is option 1: 2 months.

In the Indian Parliamentary System, `Vote on Account` is a provision that allows the government to obtain funds from the Parliament for a limited period to meet the government`s expenses until the full budget is passed. Typically, the `Vote on Account` is passed for a period of 2 months, except in the year of elections. It is important to note that the `Vote on Account` is a temporary arrangement and is not the same as the full budget. It allows the government to continue its functioning and incur essential expenses until a detailed budget is presented and approved by the Parliament.