Given a dictionary d and a list lst, remove all elements from the dictionary whose key is an element of lst. for example, given the dictionary {1: 2, 3: 4, 5: 6, 7: 8} and the list [1, 7], the resulting dictionary would be {3: 4, 5: 6}. assume every element of the list is a key in the dictionary.

d = {1:2, 3:4, 5:6, 7:8}

list = [1, 7]

not_found = set()

for x in list:

  if x not in d.keys():

     not_found.add(x)

  else:

     del d[x]

print(d)

print(not_found)

the correct answer is c.stops after infancy and childhood.

myelin is the substance of the central nervous system (cns) that insulates nerve cell axons to increase the speed at which nerve impulse travels. myelination is a process of myelin formation. this process occurs postnatally, begins in the embryo during the midst of early development and finishes after birth.