Step 1: About ICC. The International Cricket Council (ICC) is the global governing body of cricket. Step 2: Tenure. In 2012, New Zealand's Alan Isaac took over as the President of ICC, succeeding Sharad Pawar of India. Step 3: Eliminate wrong options.
- N. Srinivasan → served as ICC Chairman later (2014).
- Suresh Kalmadi → was related to Indian Olympic Association, not ICC.
- Nasim Ashraf → was Chairman of Pakistan Cricket Board. Step 4: Conclude. The correct answer is Alan Isaac.
\[
\boxed{\text{Alan Isaac}}
\]