The teenager was admitted to hospital in Delhi after the attack in Hathras district of the northern state of Uttar Pradesh.
She later died of her injuries.
The case had sparked global outrage after authorities allegedly forcibly cremated her body without her family's consent.
On Thursday, a court in Hathras town said that only one of the four accused - who all belonged to a higher caste - was found guilty of culpable homicide not amounting to murder and for offences under Scheduled Caste and Scheduled Tribe (Prevention of Atrocities) Act, which deals with crimes against Dalits and tribals.
The case had sparked huge protests in India after disturbing details about the alleged crime emerged. sexycasino