Concept: This question tests your understanding of seed germination and the development of the primary root in plants.

Why (B) is correct: During seed germination, the embryo within the seed develops. The embryonic root, known as the radicle, is the first part to emerge from the seed and grows downwards to form the primary root. This primary root then branches out to form the entire root system.

Why other options are wrong:

• (A) Pedicel: A pedicel is the stalk that supports an individual flower in an inflorescence. It has no role in root development.
• (C) Plumule: The plumule is the embryonic shoot that develops into the stem, leaves, and flowers.
• (D) Stamen: The stamen is the male reproductive organ of a flower, producing pollen.

Common Mistake: Students sometimes confuse the plumule and radicle, as both are embryonic parts. Remember, 'R' for Radicle and Root, 'P' for Plumule and Plant shoot.

NEET Tip: Visualize the parts of a germinating seed: the radicle emerges first, followed by the plumule. This sequence is crucial for understanding plant development.

Correct Answer: (B)