AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
(B) West Bengal, Kerala and Tripura
The Communist Party of India (Marxist) enjoys particularly strong support in West Bengal, Kerala and Tripura.
Although the source passages do not explicitly state this fact, it is standard NCERT Class 10 Political Science (Chapter 4) content. CPI(M) is recognised as a national party with its stronghold in these three states. Option B is the textbook answer examiners expect.