Question

The strong nuclear force between nucleons is attractive but short range; the Coulomb force between protons is long range, but repulsive.

• A. He gas is rare, so collisions between nuclei are also rare;
• B. It happens and the we see in nature was formed by this method only in Earth's atmosphere;

Answer 1

The correct option is A He gas is rare, so collisions between nuclei are also rare;

Nuclear interactions are interesting battlegrounds of different forces - mainly the Coulomb force, which is electrostatic in nature, and the strong nuclear force.
The strong nuclear force is a strong attractive force, but only activates when you bring the nucleons closer to each other than a few femtometers. At these length scales, no force in the universe is stronger than the strong nuclear force.