*Range of Gravity is infinite.
*Range of electromagnetic force is also infinite.
*Range of Strong nuclear force is 10^-15m.
*And range of Weak nuclear force is 10^-16m.

Hence, B is correct i.e. Weak nuclear force.

Explanation:
The fundamental forces are the forces responsible for all the interactions between particles. There are four fundamental forces in nature: gravitational, electromagnetic, weak nuclear, and strong nuclear. Each of these forces has a different range, which refers to the distance over which the force can act. The force with the shortest range is the weak nuclear force.

The Weak Nuclear Force:
The weak nuclear force is one of the four fundamental forces of nature. It is responsible for the decay of subatomic particles such as neutrons and protons. The weak nuclear force has a very short range, which is why it is considered to have the shortest range of all the fundamental forces.

Short Range:
The range of a force is the distance over which it can act. The weak nuclear force has a very short range, which means that it can only act over very small distances. In fact, the range of the weak nuclear force is only about 10^-18 meters, which is much smaller than the other fundamental forces.

Comparison with Other Fundamental Forces:
The gravitational force has an infinite range, which means that it can act over any distance. The electromagnetic force has a range that is also infinite, but it decreases rapidly with distance. The strong nuclear force has a range of about 10^-15 meters, which is larger than the weak nuclear force but still very short compared to the other forces.

Conclusion:
In conclusion, the weak nuclear force has the shortest range of all the fundamental forces. It is responsible for the decay of subatomic particles and can only act over very small distances. The other fundamental forces have much longer ranges and can act over much larger distances.