The answer is A which is CH4.
Destruction of myelin will affect the nerve and there will be the less conduction of electrical impulses from the brain to other parts of the body and the nerve signal sent to the brain are delayed. These damaged nerve areas form sclerosis which disrupts the signalling capacity of the nerve. This may occur due to genetic defects, infectious agents, auto immune reactions and trauma.
I'm pretty sure it is B. neap tide.
If that is wrong, then it is D. spring tide.
Answer:
B. Gametophytes of seedless vascular plants
