This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.H.D., Subject name: Pediatrics
Which of the following is not seen in congental rubella syndrome? 
Select and explain. 
A. Atrial septal defect, B. Ventricular septal defect, C. Patent ductus arteriosus, D. Pulmonary stenosis
A: Atrial septal defect
Answer: A: Atrial septal defect 
Explanation: Ans. is 'a' i.e., Atrial septal defect o Cardiac anomalies in Congenital rubella (In decreasing order of frequency) - PDA (most common), PS, VSD, ASDo ASD is the best answer amongst the given options because amongst the given options, ASD is least commonly associated with congential rubella.