<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:An autopsy was performed on a 2-year-old male child. The clinical report stated that the childs parents were first cousins, and that he had deteriorated physically and mentally over the past year, becoming deaf, unable to eat, and paralyzed. A brain biopsy demonstrated the accumulation of GM2-gangliosides in the neurons. Which of the following enzymes was missing from this child?? A: Sphingomyelinase, B: a-galactosidase A, C: ß-galactocerebrosidase, D: Hexosaminidase A, E: a-L-iduronidase,  <response>: This is a question about an inherited metabolic disorder in a child whose parents were first cousins. The symptoms described deterioration, deafness, inability to eat, paralysis along with the accumulation of GM2 gangliosides in neurons on brain biopsy indicate Tay-Sachs disease. This is caused by a deficiency of hexosaminidase A enzyme.D: Hexosaminidase A 