Explanation:

- Option 1: Calcutta

- Not where the Communist Party of India was founded. It's associated with other important events in Indian history, like the Calcutta Session of Congress.

- Option 2: Britain

- Britain played a vital role in India's historical context due to colonization, but it's not the founding location of the Communist Party of India.

- Option 3: Lahore

- Lahore has historical significance in Indian subcontinent events, but it's not linked to the founding of the Communist Party of India.

- Option 4: Tashkent

- The Communist Party of India was indeed founded in Tashkent in October 1920.

- This occurred during meetings initiated by M.N. Roy, a prominent Indian revolutionary.