Which of the following statements is/are true
(A) It the stem is jointed with solid nodes and hollow internodes, it is called caudex
(B) In Tridax the stem is decumbent
(C) Corn is a condensed form of rhizome growing more or less in vertical direction
(D) Sucker is an underground modification of stem
(E) Biparous type of cymose branching is seem in Saraca.

Options

A. a, d, e
B. b, c, and d only
C. c and d only
D. b, c, e only

Answer

To determine which statements are true regarding the modifications and characteristics of stems, let's analyze each statement step by step.

### Step-by-Step Solution:

1. **Statement (A)**: "If the stem is jointed with solid nodes and hollow internodes, it is called caudex."
- **Analysis**: This statement is **false**. The term "caudex" refers to a woody trunk, not a stem with solid nodes and hollow internodes. The correct term for a stem with solid nodes and hollow internodes (like bamboo) is "knotty" or "jointed stem."

2. **Statement (B)**: "In Tridax, the stem is decumbent."
- **Analysis**: This statement is **true**. A decumbent stem lies on the ground with the tips turning upward. Tridax, a type of flowering plant, exhibits this growth form.

3. **Statement (C)**: "Corn is a condensed form of rhizome growing more or less in vertical direction."
- **Analysis**: This statement is **true**. Corn (maize) has a thickened underground stem that is a modified rhizome, growing vertically.

4. **Statement (D)**: "Sucker is an underground modification of stem."
- **Analysis**: This statement is **true**. A sucker is a non-green, cylindrical stem that arises from the underground modifications of the stem, typically growing from the base of the plant.

5. **Statement (E)**: "Biparous type of cymose branching is seen in Saraca."
- **Analysis**: This statement is **false**. Saraca, commonly known as the Ashoka tree, exhibits uniparous cymose branching, where only one lateral branch is produced at a time, not biparous.

### Conclusion:
Based on the analysis:
- **True Statements**: (B), (C), (D)
- **False Statements**: (A), (E)

Thus, the correct answer is that statements B, C, and D are true.

### Final Answer:
**B, C, D are true statements.**

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