Switch in Dextraposition of great vessels

Q . Factors that preclude the use of a single-stage arterial  switch reconstruction of dextrotransposition of the great vessels include:
A. Age older than 6 weeks with a left ventricular pressure of less than 50% of systemic pressure.
B. Dynamic left ventricular outflow tract obstruction.
C. Intramural coronary artery anatomy.
D. Subpulmonary VSD.

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