The popularly elected House of the Indian Parliament is the Lok Sabha. The Lok Sabha is also known as the House of the People. It is made up of members who are directly elected by the citizens of India. The Lok Sabha represents the voice of the people and is responsible for making and passing laws. It also plays a crucial role in the functioning of the government by holding the executive accountable. On the other hand, the Rajya Sabha, also known as the Council of States, is the upper house of the Indian Parliament. Its members are not directly elected by the people but are chosen by the members of the State Legislative Assembly. So, option 2 is correct as the Lok Sabha is the only popularly elected house in the Indian Parliament.