Explanation:

- Small Finance Banks (SFBs) are a type of bank that provides basic banking products such as deposits and supply of credit, but with a focus on serving underserved and unserved sections.

- The Reserve Bank of India (RBI) requires a minimum paid-up capital for starting a Small Finance Bank.

- Option 1: Rs. 100 Cr - Correct Answer. This is the minimum paid up capital requirement for Small Finance Banks as per RBI guidelines.

- Option 2: Rs. 10 Cr - Incorrect. This is too low for SFBs.

- Option 3: Rs. 1 Cr - Incorrect. This is significantly below the required limit.

- Option 4: Rs. 200 Cr - Incorrect. This is not the required capital for SFBs.

- Option 5: Rs. 150 Cr - Incorrect. This does not match the RBI stipulation.