What will be the output of the following Python code?
list1 = [1, 2, 3, 4]
list2 = [5, 6, 7, 8]
print(len(list1 + list2))
a) 2
b) 4
c) 5
d) 8
Answer: d
Explanation: + appends all the elements individually into a new list.
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