When an Ordinary Bill is referred to a joint sitting of both the Houses of Indian Parliament, it has to be passed by a simple majority of the total number of members of both the Houses present and voting.

Let`s dissect each option to better understand why option 1 is correct and the others are not:

Option 1: Simple majority of the total number of members of both the Houses present and voting. This means that more than half of the members present and voting need to vote in favor of the bill for it to be passed.

Option 2: Two-third majority of the total number of members of both the Houses. This option is incorrect because it requires a higher threshold for the bill to be passed. A two-third majority means that at least two-thirds of the total members of both the Houses need to vote in favor of the bill.

Option 3: Simple majority of the total number of members of both the Houses. This option is incorrect because it does not specify that only the members present and voting are considered for the majority. It is important to note that only the members present and voting are counted for determining the majority.

Option 4: Two-third majority of the total number of members of both the Houses present and voting. This option is incorrect because it requires