Select the correct option to test your answer: A x 1 and x 2 both are periodic B x 1 and x 2 both are not periodic C x 1 is periodic, but x 2 is not periodic D x 1 is not periodic, but x 2 is periodic Correct Answer: Option A (x 1 and x 2 both are periodic) Verified correct option for Electronics and Communication (Signal Processing).