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: Gynaecology & Obstetrics
Isotretinoin embryopathy is characterized by all except 
Select and explain. 
A. Venticulomegaly, B. Microtia, C. Conotruncal heart defects, D. Thymic hyperplasia
D: Thymic hyperplasia
Answer: D: Thymic hyperplasia 
Explanation: Isotretinoin embryopathy is characterized by thymic hypoplasia or aplasia.