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
Hea is fully developed at which age of intrauterine life ? 
Select and explain. 
A. 3rd month, B. 4th month, C. 5" month, D. 6" month
A: 3rd month
Answer: A: 3rd month 
Explanation: Ans. is 'a' i.e., 3rd month