Concept: This question tests your understanding of basic leaf morphology, specifically distinguishing between simple and compound leaves and the presence/absence of buds.

Why (B) is correct: The statement says that leaflets of a compound leaf contain a bud. This is incorrect. A bud (axillary bud) is always present in the axil of the entire leaf (whether simple or compound), but not in the axil of individual leaflets of a compound leaf. The absence of a bud in the axil of leaflets helps to distinguish a leaflet from a whole leaf.

Why other options are wrong:

• (A) A bud is present in the axil of petiole in simple leaf: This is a correct statement. The axillary bud is located in the axil of the leaf, which is the angle between the petiole and the stem.
• (C) The lamina is the green expanded part of the leaf with veins and veinlets: This is a correct definition of the leaf lamina (or leaf blade).
• (D) Midrib is middle prominent vein: This is a correct description of the midrib, which is the central, most prominent vein in the lamina.

Common Mistake: Students often confuse a leaflet with a small simple leaf, leading to errors in identifying the location of axillary buds.

NEET Tip: Remember that the presence of an axillary bud in its axil is the definitive feature of a whole leaf (simple or compound), not its leaflets.

Correct Answer: (B)