Which of the following statements is/are incorrect regarding roots?
(i) In Rhizophora, pneumatophores are found.
(ii) Tap roots of carrot, turnip and adventitious roots of sweet potato, get swollen and store food.
(iii) The stems of maize and sugarcane have supporting prop roots coming out of the lower nodes of the stem.

Options

A. I and II
B. Only II
C. II and III
D. Only III

Answer

To determine which statements regarding roots are incorrect, let's analyze each statement step by step.

### Step 1: Analyze Statement (i)
**Statement (i):** In Rhizophora, pneumatophores are found.
- **Explanation:** Rhizophora is a genus of mangrove trees that grow in waterlogged and marshy areas. These trees develop specialized roots known as pneumatophores, which are aerial roots that help in gas exchange (breathing) in anoxic (low oxygen) conditions.
- **Conclusion:** This statement is **correct**.

### Step 2: Analyze Statement (ii)
**Statement (ii):** Tap roots of carrot, turnip, and adventitious roots of sweet potato get swollen and store food.
- **Explanation:** Carrots and turnips have tap roots that are modified for storage, allowing them to store nutrients and energy. Sweet potatoes have adventitious roots that also swell and serve as storage organs.
- **Conclusion:** This statement is **correct**.

### Step 3: Analyze Statement (iii)
**Statement (iii):** The stems of maize and sugarcane have supporting prop roots coming out of the lower nodes of the stem.
- **Explanation:** Prop roots are typically associated with certain large trees, such as the banyan tree, which develop roots from their branches to provide additional support. Maize and sugarcane do not have prop roots; instead, they have fibrous root systems.
- **Conclusion:** This statement is **incorrect**.

### Final Conclusion
Based on the analysis:
- Statement (i) is correct.
- Statement (ii) is correct.
- Statement (iii) is incorrect.

Thus, the answer to the question is that **only statement (iii) is incorrect**.

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