Which statement below about the difference between analog and digital signals is incorrect?

A.
Adigital signal produces a saw-tooth wave form.

B.
Analog signals cannot be used for data communications.

C.
An analog signal produces an infinite waveform.

D.
An analog signal can be varied by amplification.

Explanation:

The correct answer is “Analog signals cannot be used for data communications”. The other answers
are all properties of analog or digital signals.