Correct Answer: ⁴₂He

Solution : The correct option is ⁴₂He.

An alpha particle is a type of subatomic particle consisting of two protons and two neutrons, and it is essentially a helium-4 nucleus. The symbol for an alpha particle is often written as ⁴₂He, where 4 represents the mass number (sum of protons and neutrons), and 2 represents the atomic number (number of protons).