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139700 Unknown

A 4-month-old boy presented with spontaneous nose bleeds and bloody diarrhea. There is a history of recurrent chest and ear infections for which the child was frequently hospitalized. On examination, it was found that the child was also suffering from atopic dermatitis and had petechiae all over the body. Blood sample of the child was taken and sent for fuher evaluation. Lab findings suggested abnormally low platelet counts along with eosinophilia and the peripheral blood smear is given below. The gene involved in the above condition is present on which chromosome: –

AChromosome 21
BChromosome 23
CX-chromosome
DChromosome 1
Unknown
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