Can someone explain to me what is mean? x in x

Question

Help me
I did not understand why he gave me false
Python Code is:
x=[1,3,5]
print(x in x)

Answer 1

Because x is an array and with x in x you Check for an array in an array but x only has numbers as elements

Answer 2

If you use:
for i in x:
print (i in x)

It would be true i guess

Answer 3

Ok thank you Jnn