The correct option is A Axillary bud
Potato, a starchy, tuberous crop of Solanum tuberosum are generally grown from seed potatoes or potato that has developed one or more "eye". The eyes are the new sprouts from which new potatoes grow. The potato being a subterranean tuber, their 'eyes' are axillary buds which have leaves in the form of tiny scales below each eye. Thus, the correct answer is option B.