A certain person eats boiled potato; one of the food component in it is
(a) lactose which is indigestible
(b) starch which does not get digested
(c) cellulose which is digested by intestinal cellulos
(d) DNA which gets digested by pancreatic DNAase
(d) Anything which cannot be digested cannot serve as 'food'. Therefore, starch and lactose in the present case have been automatically deleted. Cellulose cannot be digested by human beings, thus option (c) also stands rejected. Pancreatic juice can digest DNA which is the component of every cell.