Explanation:

The Speaker of Lok Sabha is the ex-officio President of all the Forums except the Parliamentary Forum on Population and Public Health wherein the Chairman of Rajya Sabha is the ex-officio President and the Speaker is the ex-officio Co-President. Hence statement 1 is not correct.

Each Forum consists of not more than 31 members (excluding the President, Co-President, and VicePresidents) out of whom not more than 21 are from the Lok Sabha and not more than 10 are from the Rajya Sabha. Members (other than the President, Co-President, and Vice-Presidents) of these forums are nominated by the Speaker/ Chairman from amongst the leaders of various political parties/groups or their nominees, who have special knowledge/keen interest in the subject. Hence statement 2 is not correct.

The duration of the office of members of the forum is co-terminus with their membership in the respective Houses. A member may also resign from the forum by writing to the Speaker/Chairman.

The President of the forum appoints a member-convener for each forum to conduct regular, approved programmes/meetings of the forum in consultation with the President. The meetings of the forums are held from time to time, as may be necessary, during Parliament sessions.

The Secretary-General of Lok Sabha is the Secretary to the forums. Hence statement 3 is correct.