A collision between an MBTA Silver Line bus and a car in the South End Sunday left three passengers with minor injuries, according to T officials. The crash happened after a driver illegally turned in front of the bus at Herald and Washington streets around 4 p.m., said MBTA spokesman Joe Pesaturo. The passengers went for medical treatment after they complained of back pain, Pesaturo said. The other driver was cited by police for the illegal turn, Pesaturo said.Jaclyn Reiss can be reached at email@example.com. Follow her on Twitter: @JaclynReiss.