What is a career that combines science with another interest

Art conservation science, marine science, and nuclear science can be combined with science with another interest. Anyone can have this combination with a little knowledge from each of them but later, of course, they will study and will have a strong grip over the concepts of this combined study program.
You may learn biodiversity in conservation sciences while having a background knowledge you have learned in biology previously. Whereas marine science, which is also known as oceanography can also be a great choice. You study the physical and biological aspects of the oceans. Nuclear science is the most interesting one as you enter into the world of atomic particles.

option a is correct i.e.

only sodium ions can pass through the membrane.

explanation:

in context to the membrane of nerve impulse, the outer membrane of neuron is semi permeable that is only sodium ions can pass through the membrane i.e. smaller ions can pass through the membrane while larger ions cannot pass through it.

Idk