This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Assessment of Growth, Subject name: Pediatrics
[{'content': "First Sign of pubertal development in boy is - \nSelect and explain. \nA. Enlargement of penis, B. Enlargement of testes, C. Appearance of pubic hair, D. Appearance of axillary' hair", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Enlargement of testis o In male - Sequence of change1. Growth of testes (> 3 ml in volume or & thinning of scrotum 2 5 cm in longest diameter)2 Pigmentation of scrotum & growth of penisPubic hairAxillary hairo In female -1. Breast bud - First sign2 Pubic hair3. Menarche", 'role': 'assistant'}]