Length of X chromosome is

Options

A. `8.5-9.5 mu`
B. `7.5-8.0 mu`
C. `6.5-7.5 mu`
D. `5.0-5.5 mu`

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the length of the X chromosome. It is important to know the typical measurements of chromosomes in micrometers (microns).

2. **Identifying the X Chromosome**: The X chromosome is one of the sex chromosomes in humans. It is crucial to note that it carries a significant number of genes, approximately 900.

3. **Finding the Length of the X Chromosome**: The length of the X chromosome is typically reported to be around 53 micrometers (microns).

4. **Considering the Range**: The length of the X chromosome can vary, and it is stated that it can range from 5 to 9.5 micrometers. However, the most accurate and widely accepted measurement is approximately 53 micrometers.

5. **Final Answer**: Based on the information provided, the correct answer for the length of the X chromosome is approximately 53 micrometers.