Concept: This question tests your understanding of plant adaptations to aquatic environments, specifically the morphological features of leaves in different types of hydrophytes.

Why (C) is correct: Submerged plants (hydrophytes that are completely underwater) often have finely dissected or ribbon-like leaves. This adaptation increases the surface area for efficient absorption of gases (like CO₂) and nutrients directly from the water, as stomata are absent or non-functional. It also helps in reducing resistance to water currents.

Why other options are wrong:

• (A) free floating plants: These plants typically have broad, often spongy leaves (e.g., water hyacinth) to aid buoyancy and gas exchange with the air.
• (B) rooted floating leaved plants: These plants have broad, flat leaves that float on the water surface (e.g., water lily) to maximize light absorption.
• (D) emerged plants: These are plants rooted in water but with most of their vegetative parts exposed to air. Their leaves are typically broad and aerial, similar to terrestrial plants.

NEET Tip: Remember that plant adaptations are directly related to their environment. Submerged plants need to maximize absorption from water and minimize damage from currents.

Correct Answer: (C)