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: Radiology
Which of the following are most sensitive to X-ray? 
Select and explain. 
A. Tooth buds and salivary glands, B. Nerve and muscle tissue, C. Hair and nails, D. Cartilage
A: Tooth buds and salivary glands
Answer: A: Tooth buds and salivary glands 
Explanation: None