New Delhi, Oct 20 (ANI): Even as the Prime Minister's Office rejected any criminality in the controversial allocation of coal block to Hindalco, saying Prime Minister Manmohan Singh had approved it on the basis of merits of the case placed before him, JD (U) Leader, KC Tyagi on Sunday asked why the PMO was defending the corporate, when they in turn had done nothing for them in the last 10 years.