The correct option is B Axillary bud
Buds
Buds are underdeveloped or very young shoots which have a condensed main axis and short internodes with young leaves crowded and folded over the apex. Based on their location buds can be of the following types -
1. Apical buds or terminal buds are present at the tip of the main stem.
2. Axillary buds are located at the axil of the leaf.
3. Adventitious buds do not arise from the leaf axil, shoot tip or apex of the plant but grow from elsewhere on the plant like roots, leaves, etc.
4. Accessory buds are more than one bud that arise in the axil of a single leaf.
Tuber
Potato tubers are modified underground stems that have notches called eyes which bear scale leaves. Buds arise from the axil of these scale leaves and are hence called axillary buds.
Final answer
(b). Axillary bud