Explanation:

- Option 1: Mohammad Shafi

Mohammad Shafi was a prominent politician and member of several legislative councils. However, he is not known for introducing a bill on primary education in the imperial Legislative Council.

- Option 2: Feroz Shah Mehta

Feroz Shah Mehta was a notable Indian political leader and reformer. His contributions were significant in various areas but not directly linked to the introduction of a primary education bill in that context.

- Option 3: G.K. Gokhale

Gopal Krishna Gokhale was a respected freedom fighter and social reformer. He introduced a bill in 1911 for compulsory and free primary education in the imperial Legislative Council.

- Option 4: Shankaran Nair

Shankaran Nair played a significant role in Indian politics and the British Raj, but he was not associated with introducing this specific education bill.