The correct answer is option 3: 1/10. A quorum refers to the minimum number of members required to be present at a meeting for it to be valid and conduct business. In the case of the Lok Sabha, the lower house of the Indian Parliament, a quorum is required for the House to convene and proceed with its business. The quorum is determined as 1/10th of the total number of members of the Lok Sabha.

It is important to note that if a quorum is not met, the session may be adjourned or postponed until a sufficient number of members are present. This requirement ensures that there is a reasonable representation of members present to make decisions and complete the legislative process.