actually countries have party system not states like america with 2 party system , china 1 , and as we know india have multi party system

One Party System, Multi Party System, and Multi Party System with Alliance in Indian States

One Party System:
A one-party system refers to a political system where only one political party is legally allowed to hold power, control the government, and run for elections. In India, the concept of a one-party system is not prevalent at the state level. However, there have been instances in the past where a single party has dominated the political landscape in certain states.

Multi Party System:
A multi-party system is a political system in which several political parties exist and compete in elections to form a government. India follows a multi-party system at both the national and state levels. The states of India have a diverse political landscape with the presence of multiple parties.

Key Indian States with Multi Party System:
1. Uttar Pradesh: Uttar Pradesh, the most populous state in India, is known for its vibrant multi-party system. Parties like Bharatiya Janata Party (BJP), Samajwadi Party (SP), Bahujan Samaj Party (BSP), and Indian National Congress (INC) have a significant presence in the state.
2. Maharashtra: Maharashtra is another state where multiple parties contest elections. The major parties in Maharashtra include Shiv Sena, Nationalist Congress Party (NCP), Indian National Congress (INC), and Bharatiya Janata Party (BJP).
3. West Bengal: West Bengal has a rich political history with multiple parties vying for power. The prominent parties in the state are All India Trinamool Congress (AITC), Bharatiya Janata Party (BJP), and Communist Party of India (Marxist) (CPI(M)).

Multi Party System with Alliance:
In some cases, political parties form alliances or coalitions to collectively contest elections and form a government. This is known as a multi-party system with alliances.

Key Indian States with Multi Party System with Alliance:
1. Tamil Nadu: Tamil Nadu is known for its multi-party system with alliances. The two major alliances in the state are the United Progressive Alliance (UPA), led by Dravida Munnetra Kazhagam (DMK), and the National Democratic Alliance (NDA), led by All India Anna Dravida Munnetra Kazhagam (AIADMK).
2. Bihar: Bihar also witnesses a multi-party system with alliances. The two major alliances in the state are the Mahagathbandhan, comprising Rashtriya Janata Dal (RJD), Indian National Congress (INC), and other regional parties, and the National Democratic Alliance (NDA), led by Janata Dal (United) (JDU) and Bharatiya Janata Party (BJP).
3. Jammu and Kashmir: Jammu and Kashmir have experienced a multi-party system with alliances. The two major alliances are the People's Alliance for Gupkar Declaration (PAGD), comprising regional parties, and the Bharatiya Janata Party (BJP)-led alliance.

Overall, while most states in India have a multi-party system, some states also witness alliances formed by political parties to gain a collective advantage in elections and form a government. The nature of political systems in different states may vary due to regional dynamics, party preferences, and electoral outcomes.