The correct answer is option 1, which states that Leftist Parties in India have formed the government at different times in Kerala, West Bengal, and Tripura.

First, let`s understand what is meant by Leftist Parties. Leftist Parties are political parties that follow leftist ideologies, which generally advocate for social equality, collective ownership, and progressive reforms. These parties often focus on the rights and welfare of the working class.

Now, let`s look at each of the options to understand why option 1 is the correct answer:

- Option 1: This option correctly states that the Leftist Parties have formed the government at different times in Kerala, West Bengal, and Tripura. These states have seen governments led by Leftist Parties such as the Communist Party of India (M) and Communist Party of India (Marxist).

- Option 2: This option states Manipur instead of Tripura. While Manipur has seen governments led by regional parties, it has not specifically seen the Leftist Parties forming the government.

- Option 3: This option states Meghalaya instead of West Bengal. Meghalaya has not seen the Leftist Parties forming the government. West Bengal, on the other hand, has a long history of Leftist Parties forming the government.