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: Pediatrics
All of the following are true about ASD ilk except – 
Select and explain. 
A. Right atrial hypertrophy, B. Left atrial hypertrophy, C. Right ventricular hypertrophy, D. Pulmonary hypertension
B: Left atrial hypertrophy
Answer: B: Left atrial hypertrophy 
Explanation: In ASD there is abnormal communication between left and right atria which causes left to right shunt because pressure in left atrium is higher (3-5 mm Hg) than right atrial piessure.
This results in : -


Volume overload to right atrium  → Dilatation and hypertrophy of right atrium.
Volume overlead to right ventricle  → Dilatation and hypertrophy of right ventricle.
Increased blood flow through lungs → Pulmonary plethora which can cause pulmonary hypertension.