system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Florence test done on dry seminal stain shows dark-brown crystals due to: September 2012, March 2013 (e)
assistant
The correct answer is  Ans. D i.e. Choline Florence test of semen depends on choline