Questions about who first recommended a particular institution are often best solved by placing each option on a timeline and checking which one is both early enough and specific enough to count as the founding recommendation, rather than relying only on memorised facts about each body.
Placing the options on a timeline and matching them to their actual subject matter shows that only the First Administrative Reforms Commission of 1966 is both early enough and specific enough to be the original source of the Ombudsman-style recommendation in India.
So the correct answer is Administrative Reforms Commission, 1966.