This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
[{'content': 'Leydig cells are derived embryologically from \nSelect and explain. \nA. Mesoderm of gonadal ridge, B. Endoderm of Genital tubercle, C. Germ cells, D. None of the above', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Mesoderm of gonadal ridge Testosterone producing cells, called leyding cells, develop from mesoderm of the gonadal ridge and are located between sex cords.They produce testosterone by week 8.", 'role': 'assistant'}]