hydrogen fuel cells burn with and produce
a. water, oxygen
b. oxygen, water
c. carbon dioxide, oxygen
d. oxygen, carbon dioxide
select the best answer from the choices provided

option a is correct i.e.

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.