This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: DNB 2018, Subject name: Physiology
[{'content': 'Mullerian inhibiting substance secreted by \nSelect and explain. \nA. Stroma, B. Seoli cells, C. Leydig cells, D. All of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: -Form blood-testis barrier -Nourishes developing sperm Spermatogenesis -Secrete testosterone under LH influence -Synthesis of Mullerian inhibiting Factor -Secrete inhibin which inhibits FSH Testosterone exes negative feedback on LH & GNRH', 'role': 'assistant'}]