To solve this question, the user needs to understand the concept of signalling methods and how information can be transmitted.

The correct answer is:

The Answer is: B - Two

Explanation:

Information can be transmitted via two signalling methods:

1. Analog Signalling: Analog signalling involves the transmission of information via continuous signals. An example of analog signalling is voice communication over the telephone.

2. Digital Signalling: Digital signalling involves the transmission of information via discrete signals. Digital signals can be transmitted using different techniques such as amplitude shift keying (ASK), frequency shift keying (FSK), and phase shift keying (PSK). Digital signalling is used in computer networks, mobile phones, and other digital devices.

Options A, C, and D are incorrect because information can be transmitted via two signalling methods, not one, four, or five.