The correct answer is option 1, a simple majority of the members present.

In a joint sitting of the two Houses of Parliament, the Bill is required to be passed by a simple majority of the members present. This means that more members need to vote in favor of the Bill than against it in order for it to be passed. It is important to note that this majority is based on the members present at the time of voting, rather than the total membership of both Houses. This is different from option 2, which suggests an absolute majority of the total membership, and options 3 and 4, which mention a relative majority of the members present. However, if the question had specifically mentioned an absolute majority of the total membership as the requirement, then option 2 would have been the correct answer.