Solution:
Both Assertion and Reason are correct, and the Reason is the correct explanation of Assertion.India has a multi-party system because India is a country of variety as there are social and geographical variations in India. The multi-party system boosts democracy. However, it has a multi-party system which means India has a political system where numerous parties can exist. The reason is that the country provides freedom to all ideologies to be represented in the party system.