<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 2-week-old male newborn is brought to the physician because his mother has noticed her son has occasional bouts of turning blue in the face while crying. He also tires easily and sweats while feeding. He weighed 2150 g 4 lb 11 oz at birth and has gained 200 g 7 oz. The baby appears mildly cyanotic. Examination shows a 36 systolic ejection murmur heard over the left upper sternal border. A single S2 is present. An echocardiography confirms the diagnosis. Which of the following factors is the main determinant of the severity of this patients cyanosis?? A: Right ventricular outflow obstruction, B: Left ventricular outflow obstruction, C: Right ventricular hypertrophy, D: Ventricular septal defect, E: Atrial septal defect,  <response>: This is a clinical vignette describing a 2-week-old male newborn with symptoms of cyanosis while crying, easy fatigability while feeding, and sweating during feeds. He has a heart murmur on exam. Echocardiography confirms the diagnosis. The question asks about the main determinant of the severity of cyanosis in this patient. Based on the description, this is likely a patient with tetralogy of Fallot, which classically presents with cyanosis due to right ventricular outflow tract obstruction. The severity of cyanosis in tetralogy of Fallot is mainly determined by the degree of right ventricular outflow tract obstruction.Choices A and B mention right and left ventricular outflow obstruction, respectively. Choice C refers to right ventricular hypertrophy, which may be present but does not directly determine cyanosis. Choices D and E refer to ventricular and atrial septal defects which are not typically associated with cyanosis.A: Right ventricular outflow obstruction 