Person ‘A’ is suffering from an inborn error of metabolism due to an autosomal recessive trait. This error results mental retardation in him. Person ‘B’ also have retarded mental development but in this person it is due to trisomy of a particular chromosome.Select the correct option regarding person ‘A’ and person ‘B’.[0.7 mark]

Person ‘A’ is suffering from an inborn error of metabolism due to

1.	Person ‘A’ is suffering from an inborn error of metabolism due to an autosomal recessive trait. This error results mental retardation in him. Person ‘B’ also have retarded mental development but in this person it is due to trisomy of a particular chromosome.Select the correct option regarding person ‘A’ and person ‘B’.[0.7 mark]
Answer» Person ‘A’ is suffering from an inborn error of metabolism due to an autosomal recessive trait. This error results mental retardation in him. Person ‘B’ also have retarded mental development but in this person it is due to trisomy of a particular chromosome. Select the correct option regarding person ‘A’ and person ‘B’. [0.7 mark]