The All India Trade Union Congress (AITUC) is the oldest trade union federation in India, founded in 1920. It is affiliated with the Communist Party of India (Marxist).

The AITUC's primary objective is to promote, protect, and improve the interests, rights, and working conditions of workers in India.

The Indian Medical Association (IMA) is a professional organization of doctors in India. It is not considered a major pressure group in the same way that the other options are.

The Confederation of Indian Industry (CII) is a non-profit business organization that works to promote the interests of Indian industry. It does this by lobbying the government, conducting research, and providing support to its members.

The Indian National Congress (INC) is a political party, not a pressure group. The other options are all major pressure groups that represent the interests of farmers in India.

The All India Kisan Sabha (AIKS) is a peasant organization that works to promote, protect, and improve the interests, rights, and working conditions of farmers in India.

The Indian National Congress (INC) is a political party, not a pressure group. The other options are all major pressure groups that represent the interests of students in India.

The All India Students' Federation (AISF) is a student organization that works to promote, protect, and improve the interests, rights, and educational conditions of students in India.

The Indian National Congress (INC) is a political party, not a pressure group. The other options are all major pressure groups that represent the interests of women in India.

The All India Women's Conference (AIWC) is a women's organization that works to promote, protect, and improve the interests, rights, and social and economic conditions of women in India.

The Indian National Congress (INC) is a political party, not a pressure group. The other options are all major pressure groups that represent the interests of Dalits (formerly known as untouchables) in India.

The All India Dalit Rights Federation (AIDRF) is a Dalit organization that works to promote, protect, and improve the interests, rights, and social and economic conditions of Dalits in India.

The Indian National Congress (INC) is a political party, not a pressure group. The other options are all major pressure groups that represent the interests of Dalits (formerly known as untouchables) in India.

The National Campaign for Dalit Human Rights (NCDHR) is a Dalit organization that works to promote, protect, and improve the interests, rights, and social and economic conditions of Dalits in India.

The Indian National Congress (INC) is a political party, not a pressure group. The other options are all major pressure groups that represent the interests of Muslims in India.

The All India Muslim Majlis-e-Mushawarat (AIMMM) is a Muslim organization that works to promote, protect, and improve the interests, rights, and social and economic conditions of Muslims in India.