## **Core Concept**
The question focuses on identifying a specific congenital cyanotic heart disease characterized by left ventricular hypertrophy and left atrial enlargement. Congenital cyanotic heart diseases typically involve right-to-left shunting of blood, leading to cyanosis. The conditions mentioned involve various structural anomalies.

## **Why the Correct Answer is Right**
The correct answer, **Total Anomalous Pulmonary Venous Connection (TAPVC)**, particularly the supracardiac type, can present with left atrial enlargement and left ventricular hypertrophy. In TAPVC, the pulmonary veins connect anomalously to the systemic venous circulation rather than directly to the left atrium. This condition often leads to obstruction of pulmonary venous return, which can cause left atrial enlargement and subsequently left ventricular hypertrophy due to increased pressure and volume load.

## **Why Each Wrong Option is Incorrect**
- **Option A:** Tetralogy of Fallot typically presents with right ventricular hypertrophy due to pulmonary stenosis or atresia, not left ventricular hypertrophy.
- **Option B:** Transposition of the Great Arteries (TGA) can have a variable presentation but commonly shows right ventricular hypertrophy. However, with the use of prostaglandins to keep the ductus arteriosus open and mixing of blood, it might not directly imply left ventricular hypertrophy and left atrial enlargement as defining features.
- **Option D:** Tricuspid Atresia usually presents with right ventricular hypoplasia and might not directly cause left ventricular hypertrophy and left atrial enlargement as primary features.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that in **Total Anomalous Pulmonary Venous Connection (TAPVC)**, the presence of cyanosis with signs of heart failure (such as left atrial enlargement and left ventricular hypertrophy) should prompt consideration of this diagnosis, especially in a neonate or infant.

## **Correct Answer:** . Total Anomalous Pulmonary Venous Connection (TAPVC)