Blood and bone marrow tests are usually performed to detect

Options

A. Anaemia
B. Leukemia
C. Thrombocytopenia
D. Filariasis

Answer

To solve the question regarding what blood and bone marrow tests are usually performed to detect, we can analyze each option provided:

### Step 1: Understand the Purpose of Blood and Bone Marrow Tests
Blood and bone marrow tests are diagnostic tools used to evaluate various blood disorders and conditions. They can provide insights into the number and types of cells in the blood, as well as the health of the bone marrow.

### Step 2: Evaluate Each Option
1. **Anemia**: Anemia refers to a condition where there is a deficiency of red blood cells or hemoglobin in the blood. A complete blood count (CBC) can diagnose anemia, but it typically does not require a bone marrow test. Thus, this option is not correct.

2. **Leukemia**: Leukemia is a type of cancer that affects blood and bone marrow. It involves the uncontrolled growth of white blood cells. Blood tests can show abnormal levels of white blood cells, and a bone marrow test is essential for confirming the diagnosis and understanding the type of leukemia present. Therefore, this option is correct.

3. **Thrombocytopenia**: This condition is characterized by a low platelet count. A complete blood count can help diagnose thrombocytopenia, but it does not necessarily require a bone marrow test. Thus, this option is incorrect.

4. **Filariasis**: Filariasis is caused by parasitic infections (specifically roundworms) and is diagnosed through blood tests. It does not require bone marrow testing. Hence, this option is also incorrect.

### Step 3: Conclusion
Based on the evaluations, the correct answer is **Option 2: Leukemia**, as blood and bone marrow tests are specifically performed to detect this type of blood cancer.

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