The correct answer is: B) Communist Party of India.
The Communist Party of India (CPI) is a communist political party in India. It was founded in 1920, and is the oldest communist party in the country. The CPI has played a pivotal role in many peasant and worker struggles in Kerala. In the 1930s, the CPI led the struggles of agricultural workers in Malabar. In the 1940s, the CPI led the struggles of industrial workers in Travancore. In the 1950s, the CPI led the struggles of peasants in the Kuttanad region. The CPI has also played a significant role in the political life of Kerala. The party has been a member of the ruling coalition in Kerala for most of the time since 1957.
The other options are incorrect for the following reasons:
- A) Indian National Congress is a centre-left political party in India. It was founded in 1885, and is the oldest political party in the country. The INC has played a significant role in the political life of India, but it has not played a major role in peasant and worker struggles in Kerala.
- C) Nair Service Society is a social service organization of the Nair community in Kerala. It was founded in 1903, and is one of the largest non-governmental organizations in India. The NSS has played a significant role in the social and economic development of Kerala, but it has not played a major role in peasant and worker struggles in Kerala.
- D) Sree Narayana Dharma Paripalana Yogam (SNDP) is a social service organization of the Ezhava community in Kerala. It was founded in 1882, and is one of the largest non-governmental organizations in India. The SNDP has played a significant role in the social and economic development of Kerala, but it has not played a major role in peasant and worker struggles in Kerala.