Read the passage given below carefully and answer the questions:
Thus, with the elections of 1989, a long phase of coalition politics began in India. Since then, there have been nine governments at the Center, all of which have either been coalition governments or minority governments supported by other parties, which did not join the government. In this new phase, any government could be formed only with the participation or support of many regional parties. This applied to the National Front in 1989, the United Front in 1996 and 1997, the NDA in 1997, BJP-led coalition in 1998, NDA in 1999 and the UPA in 2004.
1. What is meant by coalition politics?
2. Name any two regional political parties which were a part of coalition government.
3. Write the full form of NDA.
4. What does a minority government mean?