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: Pathology
Edwards syndrome is - 
Select and explain. 
A. Trisomy 21, B. Trisomy 18, C. Trisomy 13, D. 5 P
B: Trisomy 18
Answer: B: Trisomy 18 
Explanation: Ans. is 'b' i.e., Trisomy 18