Immunoglobulin present in tears is:

Options

A. IgG
B. IgE
C. IgA
D. IgM

Answer

To answer the question "Immunoglobulin present in tears is:", follow these steps:

### Step-by-Step Solution:

1. **Understand the Types of Immunoglobulins**: Familiarize yourself with the different types of immunoglobulins (antibodies) which include IgG, IgA, IgM, and IgE. Each type has different functions and locations in the body.

2. **Identify the Role of Immunoglobulins**: Recognize that immunoglobulins are produced by plasma cells and are crucial for the immune response. They help in identifying and neutralizing pathogens like bacteria and viruses.

3. **Focus on Secretory Immunoglobulin**: Note that certain immunoglobulins are found in secretions. For example, IgA is known to be present in mucosal areas and secretions such as tears, saliva, and sweat.

4. **Connect IgA with Tears**: Understand that IgA, particularly in its secretory form, plays a significant role in mucosal immunity and is specifically found in tears. This makes it essential for protecting the eyes from pathogens.

5. **Conclude the Answer**: Based on the information gathered, conclude that the immunoglobulin present in tears is IgA.

### Final Answer:
The immunoglobulin present in tears is IgA.

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