(A) : When you shake hands with your friend the force involved is electromagnetic in nature.
(R ) : Frictional force is electromagnetic in nature

Options

A. Both (A) and (R) are true and (R) is the correct explanation of (A)
B. Both (A) and (R) are true and (R) is not the
C. (A) is true but ( R) is false
D. Both (A) and (R ) are false

Answer

To analyze the statements given in the question, we will evaluate both the assertion (A) and the reason (R) step by step.

### Step-by-Step Solution:

1. **Understanding Assertion (A)**:
- The assertion states: "When you shake hands with your friend, the force involved is electromagnetic in nature."
- When two people shake hands, they are in contact, and there are forces acting at the point of contact. The primary force at play here is the electromagnetic force due to the interaction of charged particles (such as electrons) in the atoms of the skin.

2. **Understanding Reason (R)**:
- The reason states: "Frictional force is electromagnetic in nature."
- Frictional force arises when two surfaces come into contact. This force is due to the electromagnetic interactions between the charged particles on the surfaces of the two objects. Therefore, friction can indeed be classified as an electromagnetic force because it results from the interaction of charged particles.

3. **Evaluating the Truth of Both Statements**:
- Since both the assertion (A) and the reason (R) are true, we need to determine if R correctly explains A.
- The reason (R) explains that the frictional force, which is present when shaking hands, is due to electromagnetic interactions. This means that R provides a valid explanation for A.

4. **Conclusion**:
- Both A and R are true, and R is the correct explanation of A.

### Final Answer:
Both A and R are true, and R is the correct explanation of A.

---