Option B is the correct answer.
Step-by-step explanation:
We need to find number of protons, electrons and neutrons in ⁶²Ni
Mass number is 62.
That is
Number of proton + Number of neutron = 62
We know that number of proton = 28 for nickel
So
28 + Number of neutron = 62
Number of neutron = 62 - 28 = 34
We also know
Number of protons = Number of electrons
Number of electrons = 28
Option B is the correct answer.