Dicarboxylic acids pathway is seen in

Options

A. Leaves of Dolichos
B. Roots of Maize
C. Stems of Opuntia
D. Leaves of Saccharum

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the dicarboxylic acid (DCA) pathway and where it is observed.

2. **Identifying the DCA Cycle**: The Dicarboxylic Acid cycle is also referred to as the DCA cycle. It is associated with the C4 pathway of photosynthesis.

3. **C4 Pathway Overview**: The C4 pathway is a photosynthetic process that occurs in certain plants, known as C4 plants. This pathway is efficient in capturing carbon dioxide and is particularly advantageous in hot and dry environments.

4. **Examples of C4 Plants**: Some common examples of C4 plants include maize (corn), sugarcane, and sorghum. These plants utilize the DCA cycle in their photosynthetic process.

5. **Analyzing the Options**: The options provided are:
- Leaves of dolicose
- Roots of maize
- Stem of apuncia
- Leaves of saccharum

6. **Selecting the Correct Option**: Among the options, maize is a known C4 plant. Therefore, the DCA pathway is observed in the roots of maize. The other options do not represent C4 plants.

7. **Conclusion**: The correct answer is the roots of maize, as it is a C4 plant that utilizes the dicarboxylic acid pathway.

### Final Answer:
The dicarboxylic acids pathway is seen in the roots of maize.

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