<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 1-month-old boy is brought to the emergency department 25 minutes after having a seizure. His mother reports that he has become lethargic and does not cry as vigorously anymore. Examination shows muscular hypotonia and hepatomegaly. Arterial blood gas on room air shows metabolic acidosis. Serum studies show elevated levels of methylmalonic acid. A deficiency of which of the following types of enzymes is the most likely cause of this patients condition?? A: Phosphorylase, B: Phosphatase, C: Carboxylase, D: Hydroxylase, E: Mutase,  <response>: This is a clinical vignette describing a 1-month-old infant with a recent seizure, lethargy, decreased crying, hypotonia, hepatomegaly, and metabolic acidosis. The elevated methylmalonic acid level points towards a defect in vitamin B12 metabolism. Vitamin B12 is a cofactor for the enzyme methylmalonyl CoA mutase which converts methylmalonyl CoA to succinyl CoA. A deficiency in this enzyme leads to an accumulation of methylmalonic acid. Therefore, the most likely enzyme deficiency is a mutase enzyme.E: Mutase 