If you are not human, then you were not born on Earth.If you are human, then you were born on Earth.If you were not born on Earth, then you are not human.If you were born on Earth, then you are not human.
Answer
A
If you are not human, then you were not born on Earth.
B
If you are human, then you were born on Earth.
C
If you were not born on Earth, then you are not human.
D
If you were born on Earth, then you are not human.