From the Overview: "India, the world's most populous democracy, is, according to its Constitution, a 'sovereign, socialist, secular, democratic republic' where the bulk of executive power rests with the prime minister and his Council of Ministers (the Indian president is a ceremonial chief of state with limited executive powers). Since its 1947 independence, most of India's 14 prime ministers have come from the country's Hindi-speaking northern regions, and all but 3 have been upper-caste Hindus. The 543-seat 'Lok Sabha (House of the People)' is the locus of national power, with directly elected representatives from each of the country's 28 states and 8 union territories. The president has the power to dissolve this body. A smaller upper house of a maximum 250 seats, the 'Rajya Sabha (Council of States),' may review, but not veto, revenue legislation, and has no power over the prime minister or his/her cabinet. Lok Sabha and state legislators are elected to five-year terms. Rajya Sabha legislators are elected by state assemblies to six-year terms; 12 are appointed by the president."
CRS In Focus, IF10298
Congressional Research Service: https://crsreports.congress.gov/