Which is the converse of: If an integer is divisible by 42, then it is divisible by 21?
If it is not divisible by 21, then it is not divisible by 42.
If it is divisible by 21, then it is divisible by 42.
If it is not divisible by 42, then it is divisible by 21.
If it is divisible by 42, then it is divisible by 21.