Unequal division of conus cordis resulting from displacement of conotruncal septum gives rise to :: (A) Persistent truncus arterisur, (B) Coarctation of aorta, (C) Tetralogy of fallot, (D) Transposition of great vessels
Answer is C. Unequal division of conotruncal division of conotruncal septum leads to :

Pulmonary stenosis over riding of aorta.
Pulmonary stenosis leads to right ventricular hypertrophy.
Right ventricular hypertrophy leads to ventriculor sepral defect.