Which of the following option shows the correct labelling of the parts of leaf marked as A, B, C and D.

Leaf is the main photosynthetic organ of plants. In the given figure of leaf, the part marked as A, B, C and D are lamina, axillary bud, stipule and leaf base, respectively. 
Lamina or leaf blade is green and expanded portion of the leaf. In the middle of the lamina, a strong vein called midrib is present which extends from its base or apex. Axillary bud is borne at the axil of a leaf and is capable of developing into a branch shoot or flower cluster. Stipule is a small leaf-like appendage to a leaf, typically borne in pairs at the base of the leaf stalk. Leaf base is the lower part of the lamina, and is attached to petiole or stem.