Gurugram, April 14 -- A 28-year-old Gurugram traffic police constable was hit and dragged by a car for 100 metres, suffering injuries, on Friday evening at the Sector 4/7 roundabout after he signalled the driver to halt for an inspection and the driver refused to comply, police officers said on Saturday. Other police officers at the scene chased down the vehicle, rescued the constable, and arrested the car driver, they added....