According to Agarwal, Ashu saw red at Anand's suggestion and hit her.
'He held her by neck and dragged her for about 20 metres before throwing her on the road. She has suffered head and elbow injuries and was rushed to the hospital,' said Agarwal.
Anand was discharged from the hospital Sunday.
Police identified the youth and traced the car on the basis of the number of the car provided by Anand's daughter.
'We have arrested the young man and his car has been impounded. We will now be taking his statement. A case has been registered. We will take the strictest possible measures,' Aggarwal said.