Answer: Option (a) is the correct answer.
Step-by-step explanation:
It is known that ratio of neutron is to proton is equal to 1.5.
Mathematically,
This means that in a large nucleus there will be 2 protons for 3 neutrons. That is, the number of neutrons will always be slightly greater than the number of protons.
Hence, we can conclude that a stable atom that has a large nucleus most likely contains more neutrons than protons.