A person suffering from leukaemia has

Options

A. tumors in adipose tissue
B. increased number of plasma cells
C. increased number of melanocytes
D. increased number of WBCs.

Explanation

To answer the question "A person suffering from leukemia has," we need to analyze the options provided and understand what leukemia is.

### Step-by-Step Solution:

1. **Understanding Leukemia**:
- Leukemia is a type of cancer that primarily affects the blood and bone marrow. It is characterized by the overproduction of abnormal white blood cells (WBCs).

2. **Identifying the Options**:
- The options given are:
- A) Tumors in adipose tissue
- B) Increased number of plasma cells
- C) Increased number of melanocytes
- D) Increased number of WBCs

3. **Analyzing Each Option**:
- **Option A: Tumors in adipose tissue**: This refers to liposarcoma, which is not related to leukemia. Therefore, this option is incorrect.
- **Option B: Increased number of plasma cells**: This is indicative of multiple myeloma, not leukemia. Thus, this option is also incorrect.
- **Option C: Increased number of melanocytes**: This is associated with skin cancers, not leukemia. Hence, this option is incorrect.
- **Option D: Increased number of WBCs**: This is the hallmark of leukemia, where there is an abnormal increase in white blood cells. Therefore, this option is correct.

4. **Conclusion**:
- The correct answer is **D) Increased number of WBCs**. A person suffering from leukemia has an increased number of white blood cells due to the abnormal proliferation of leukocytes.