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: Forensic Medicine
Rate of growth of beard hair is: September 2004 
Select and explain. 
A. 0.2 mm/day, B. 0.4 mm/day, C. 0.6 mm/day, D. 1 mm/day
B: 0.4 mm/day
Answer: B: 0.4 mm/day 
Explanation: Ans. B i.e. 0.4 mm/ day