Baat Pate Ki: Rescue operation lasted for 50 hours then why Srishti could not survive?

Even after 50 hours of hard work, the NDRF team could not save the life of innocent Srishti. In a 50-hour rescue operation, two and a half year old Srishti, who fell in a borewell, was pulled out. After which she was taken to the hospital, where innocent Srishti was declared brought dead.