Correct answer: B
Explanation
The Rajya Sabha and the Lok Sabha, the two houses of India's Parliament, have different powers and functions. While the Lok Sabha is the lower house with members directly elected by the people, the Rajya Sabha is the upper house with members indirectly elected by the states.
However, when it comes to amending the Constitution, both houses have equal powers. According to Article 368 of the Indian Constitution, any amendment to the Constitution requires the approval of both the Rajya Sabha and the Lok Sabha.
Therefore, for a constitutional amendment to be valid, it must be approved by both houses of Parliament, giving them equal powers in the process.