Explanation:

- The Indian Constitution stipulates a term of 6 years for members of the State Legislative Council.

- Option 4: 6 years - This is correct. Members serve staggered terms, with one-third retiring every two years.

- Option 1: 10 years – Incorrect, as no legislative term in India is this long.

- Option 2: 3 years – Incorrect, as this is too short for a State Legislative Council term.

- Option 3: 4 years – Incorrect, not aligned with the Council's term length.

- The Council acts similarly to the Rajya Sabha at the national level, meant for continuity and experience continuity in governance.