Which of the following will have the same ploidy level ?

Options

A. Primary spermatocyte , primary oocyte, and second polar body
B. Oogonia , primary oocyte , and first polar body
C. Second polar body , spermatids, and primary spermatocyte
D. First polar body , secondary oocyte , and spermatozoa.

Answer

To determine which of the given options has the same ploidy level, we need to analyze the ploidy of each cell type mentioned in the options.

### Step-by-Step Solution:

1. **Understanding Ploidy Levels**:
- Ploidy refers to the number of sets of chromosomes in a cell.
- Diploid (2n) means there are two sets of chromosomes, while haploid (n) means there is one set.

2. **Analyzing the First Option**:
- **Primary Spermatocyte**: Diploid (2n)
- **Primary Oocyte**: Diploid (2n)
- **Second Polar Body**: Haploid (n)
- **Conclusion**: Not the same ploidy level (2n, 2n, n).

3. **Analyzing the Second Option**:
- **Oogonia**: Diploid (2n)
- **Primary Oocyte**: Diploid (2n)
- **First Polar Body**: Haploid (n)
- **Conclusion**: Not the same ploidy level (2n, 2n, n).

4. **Analyzing the Third Option**:
- **Second Polar Body**: Haploid (n)
- **Spermatids**: Haploid (n)
- **Primary Spermatocyte**: Diploid (2n)
- **Conclusion**: Not the same ploidy level (n, n, 2n).

5. **Analyzing the Fourth Option**:
- **First Polar Body**: Haploid (n)
- **Secondary Oocyte**: Haploid (n)
- **Spermatozoa**: Haploid (n)
- **Conclusion**: All are haploid (n, n, n).

6. **Final Conclusion**:
- The only option where all cell types have the same ploidy level is the **Fourth Option**: First Polar Body, Secondary Oocyte, and Spermatozoa (all are haploid).

### Answer:
The option that has the same ploidy level is the **Fourth Option**: First Polar Body, Secondary Oocyte, and Spermatozoa.