Concept: This question tests your understanding of flower symmetry, specifically distinguishing between zygomorphic (bilateral) and asymmetric flowers.

Why (D) is correct:

• Canna flowers are asymmetric, meaning they cannot be divided into two equal halves by any plane passing through the center.

Why other options are wrong:

• (A) pea: Pea flowers are zygomorphic (bilateral symmetry).
• (B) gulmohur: Gulmohur flowers are zygomorphic (bilateral symmetry).
• (C) bean: Bean flowers are zygomorphic (bilateral symmetry).

Common Mistake: Students often confuse asymmetric flowers with actinomorphic (radial) flowers or incorrectly assume all non-actinomorphic flowers are zygomorphic.

NEET Tip: Remember that zygomorphic flowers are characteristic of the Fabaceae (legume) family, which includes pea and bean. Gulmohur is also zygomorphic. Canna is a classic example of an asymmetric flower.

Correct Answer: (D)