Option 1: Samir Jain - There is no information provided about Samir Jain`s profession. Therefore, we cannot determine if he is a banker or not.
Option 2: Raghav Bahl - There is no information provided about Raghav Bahl`s profession. Therefore, we cannot determine if he is a banker or not.
Option 3: K.V. Kamath - The correct answer is option 3. K.V. Kamath is a prominent banker. He served as the chairman of ICICI Bank, which is one of the largest private sector banks in India. He has extensive experience and expertise in the banking sector.
Option 4: G.M. Rao - There is no information provided about G.M. Rao`s profession. Therefore, we cannot determine if he is a banker or not.
In conclusion, option 3, K.V. Kamath, is the only person among the given options who is a confirmed banker. The other options do not provide enough information to determine if they are bankers or not.