Read the following statements and select the correct option.
Statement 1 : When the immune system fails to recognise 'sell' from 'nonself' and starts destroying body's own proteins, this leads to auto-immune diseases.
Statement 2 : Addison's disease and rheumatoid arthritis are auto-immune diseases.

Options

A. Both statement 1 and 2 are correct.
B. Statement 1 is correct but statement 2 is incorrect.
C. Statement 1 is incorrect but statement 2 is correct.
D. Both statement 1 and 2 are incorrect.

Explanation

To solve the question, we need to evaluate the two statements provided and determine their correctness.

### Step-by-Step Solution:

1. **Evaluate Statement 1**:
- The statement claims that when the immune system fails to recognize 'self' from 'non-self' and starts destroying the body's own proteins, this leads to autoimmune diseases.
- This is indeed true. Autoimmune diseases occur when the immune system mistakenly identifies its own cells and proteins as foreign and attacks them. This failure in recognition is a hallmark of autoimmune disorders.

2. **Evaluate Statement 2**:
- The statement mentions that Addison's disease and rheumatoid arthritis are autoimmune diseases.
- This statement is also true.
- **Addison's disease** occurs when the adrenal glands do not produce enough cortisol due to autoimmune destruction of the adrenal cortex.
- **Rheumatoid arthritis** is characterized by the immune system attacking the joints, causing inflammation and pain, which is also an autoimmune response.

3. **Conclusion**:
- Since both statements are correct, we can conclude that the correct option is that both Statement 1 and Statement 2 are true.

### Final Answer:
Both Statement 1 and Statement 2 are correct.

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