Which of pair is not having similar types of roots ?

Options

A. Mustard , Maize
B. Mustard , Grass
C. Mustard , Bean
D. Jowar , wheat

Answer

To determine which pair does not have similar types of roots, we need to analyze the root types of the plants mentioned in the options.

### Step-by-Step Solution:

1. **Identify the Types of Roots**:
- **Tap Root**: This type of root system has one main root that grows deeper into the soil, with smaller lateral roots branching off. Examples include mustard and beet.
- **Fibrous Root**: This type consists of many thin roots that spread out from the base of the plant. Examples include maize, wheat, and jowar.

2. **Examine the First Pair (Mustard and Maize)**:
- Mustard has a **tap root** system.
- Maize has a **fibrous root** system.
- Since these are different types of roots, this pair does not have similar types of roots.

3. **Examine the Second Pair (Mustard and Grass)**:
- Mustard has a **tap root** system.
- Grass also has a **fibrous root** system.
- This pair has different types of roots.

4. **Examine the Third Pair (Wheat and Jowar)**:
- Both wheat and jowar have **fibrous root** systems.
- This pair has similar types of roots.

5. **Conclusion**:
- The first pair (Mustard and Maize) is the only pair that does not have similar types of roots. Therefore, the answer is the first option.

### Final Answer:
The pair that does not have similar types of roots is **Mustard and Maize**.