Which of the following statements is/are true ?
(A) Submerged plants have thin flexible stem.
(B) Stomata in floating plants are present only on upper surface of leaf.

Correct option is C

The Correct answer is Both are true.
• Submerged plants have thin flexible stems: This statement is generally true. Submerged plants are adapted to grow in aquatic environments, where they are fully or partially submerged in water.
• To survive in such conditions, they have specific adaptations, including thin and flexible stems. These stems help them navigate through the water and reduce the resistance caused by water flow.
• The flexibility of the stems also allows them to bend and sway with the movement of water, preventing breakage or uprooting.
• Stomata in floating plants are present only on the upper surface of the leaf. This statement is true.
In the case of floating plants, such as water lilies and lotus, the leaves are often in direct contact with water on one side and exposed to air on the other side. Hence, their stomata are typically located on the upper surface of the leaves.
This special adaptation aids these plants in their unique aquatic environment. If they had stomata on the lower surface. It would be in contact with water making gas exchange very difficult. The upper surface of the leaf with the stomata is exposed to the air allowing them to efficiently absorb carbon dioxide form the atmosphere. This design also helps to prevent unnecessary water loss, as water underneath the leaf provides a humid environment, reducing the rate of transpiration.