(a) whether the Government is aware of the recurring problem of Goeldichironomus insect, which attacks Taj Mahal, Agra Fort & Etmadaulla monuments at Agra & Fatehpur Sikri every year since 2015;
(b) whether any action has been taken to deal with this problem, including conducting any study of the problem;
(c) if so, the recommendations made in such study and the details of the action(s) taken or proposed to be taken;
(d) whether the de-silting of Yamuna has also been recommended in the above study; and
(e) if so, the details thereof?