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
Internal organs in the fetus develop at 
Select and explain. 
A. 24 weeks, B. 12 weeks, C. 10 weeks, D. 6 weeks
D: 6 weeks
Answer: D: 6 weeks 
Explanation: D i.e. 6 weeks The embryonic period or period of organogenesis occurs from 3rd- weeksQ (Langman's) /4th- 801 weeksQ (Persuad) Although the critical development events occur during first three weeks, such as cleavage of the zygote, blastogenesis & early development of the nervous & cardiovascular systems. All major external & internal structures are established during 4- 8 weeks.