The signature of the Governor of the Reserve Bank of India (RBI) appears on every Indian rupee note.
This signature confirms the note as legal tender, authorized by the central bank under the RBI Act, 1934.
The RBI is exclusively responsible for printing and issuing all currency notes in India, with the exception of one-rupee notes and coins, which are issued by the Government of India.
While one-rupee notes and coins bear the signature of the Finance Secretary, all other rupee denominations (Rs. 2, Rs. 10, Rs. 100, Rs. 500, etc.) are signed by the RBI Governor.
This ensures the note's authenticity and its acceptance for all financial transactions nationwide.
Consequently, option (C), Governor of RBI, is the correct answer.