Lok Sabha is the lower house of the Indian parliament. The number of members in Lok Sabha is determined by the Constitution of India.

Answer: (d) 543

Explanation:

Constitutional Provisions:
• Article 81 of the Constitution provides for the composition of the Lok Sabha.
• According to this article, the maximum strength of the Lok Sabha can be 552 members.
• Out of these, not more than 530 members can be from states, and not more than 20 members can be from Union Territories.
• The president of India can nominate two members of the Anglo-Indian community to the Lok Sabha if he/she feels that this community is not adequately represented in the house.

Current Strength:
• The current strength of the Lok Sabha is 543 members.
• The last general election was held in 2019, and the next one is scheduled for 2024.
• The Union Territory of Puducherry has one seat in the Lok Sabha, while the other Union Territories do not have any representation in the house.

Conclusion:
• Thus, the correct answer is (d) 543.
• It is important to note that the number of members in the Lok Sabha can be changed by Parliament through a law. However, such a law requires a special majority in both the Lok Sabha and the Rajya Sabha.