(a) whether there are two over bridges which are under construction over the river Ganga, one
at near Patna and other at Munger in Bihar and another over bridge on Koshi river near Nirmali;
(b) if so, whether there is any report regarding slow pace of construction of these bridges;
(c) if so, the reasons therefor; and
(d) the steps taken by the Railways for expeditious completion of these bridges?