The site of production of ADA in the body is

Options

A. erythrocytes
B. lymphocytes
C. blood plasma
D. ostecoytes

Explanation

**Step-by-Step Solution:**

1. **Understanding ADA**: ADA stands for adenosine deaminase, which is an enzyme that plays a crucial role in the immune system by converting toxic substances into non-toxic forms.

2. **Identifying the Function of ADA**: The primary function of ADA is to convert deoxyadenosine, which is toxic to lymphocytes (a type of white blood cell), into deoxyinosine, which is non-toxic. This conversion is vital for the proper functioning and maintenance of the immune system.

3. **Locating the Site of Production**: While ADA is produced in all cells of the body, the highest levels of ADA are found in the lymphocytes. This indicates that lymphocytes are the primary site of ADA production.

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