What is multi party system ? …

Multi-party System: If several parties compete for power and more than two parties have a reasonable chance of coming to power either on their own strength or in alliance with others, we call it a multi-party system.
India adopted multi-party system for the following reasons
(i) Being a vast, and diverse country, the multi-party system was needed to accommodate the vast population.
(ii) The diverse social and geographical features could not be represented with two or three parties.
(iii) The multi-party system in India evolved over a long time, depending on the nature of society, its social, regional division, its history of politics and its system of elections.
(iv) Multi-party system ensures a healthy competition between different parties and prevents dictatorship of a single party. Indian Constitution declares India as a democratic country. Multi-party system fulfils this criteria and provides chance for proper growth of the nation.