Tanush Kotians exceptional seven-wicket haul and crucial half-centuries from Angkrish Raghuvanshi and Divyaansh Saxena have propelled Mumbai to a commanding 311-run lead against Railways on Day Three of their Ranji Trophy Elite Group D encounter.IMAGE: Tanush Kotian celebrates after taking seven wickets against Railways. Photograph: MCA/InstagramKey PointsTanush Kotian claimed his second consecutive five-wicket haul with figures of 7/45, dismissing Railways for 259.