Assertion: Nuclear force between neutron-neutron, proton-neutron and proton-proton is approximately the same
Reason : The nuclear force does not depend on the electric charge

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion .
B. If both assertion and reason are true but reason is not the correct explanation of assertion .
C. If assertion is true but reason is false .
D. If both assertion and reason are false

Answer

To solve the question regarding the assertion and reason about nuclear forces, we will break it down step by step.

### Step 1: Understand the Assertion
The assertion states that the nuclear force between neutron-neutron, proton-neutron, and proton-proton is approximately the same.

**Hint**: Recall that nuclear forces are strong interactions that hold the nucleus together, and they act between nucleons (protons and neutrons).

### Step 2: Understand the Reason
The reason provided states that the nuclear force does not depend on the electric charge.

**Hint**: Consider how nuclear forces differ from electromagnetic forces, which do depend on charge.

### Step 3: Analyze Nuclear Forces
Nuclear forces are indeed strong and act between nucleons regardless of their charge. The nuclear force is attractive and operates over very short ranges, typically on the order of 1 femtometer (10^-15 meters).

**Hint**: Compare the strength of nuclear forces with electromagnetic forces to understand their nature.

### Step 4: Relationship Between Assertion and Reason
Since the nuclear force is independent of electric charge, it applies equally to neutron-neutron (neutral), proton-neutron (one positive, one neutral), and proton-proton (both positive) pairs. Therefore, the assertion is supported by the reason.

**Hint**: Think about how the presence or absence of charge affects the interactions between particles.

### Step 5: Conclusion
Both the assertion and the reason are true, and the reason correctly explains the assertion. Therefore, the correct option is that both assertion and reason are true, and the reason is the correct explanation of the assertion.

**Final Answer**: Both assertion and reason are true, and the reason is the correct explanation of the assertion.