<prompt> The different semen in case of gang rape is identified by:-Acid phosphatase testChristmas tree stainPSASingle photon flourimetry  <response>: Single photon fluorimetry has been used to differentiate between different semen in a gang rape case TESTS FOR SEMINAL STAINS Creatine phosphokinase test Acid phosphatase testQ Florence testQ Choline iodide crystals Barberios test crystals of spermin picrate 