What transmission media is used for normal telephone service? Select one:

A. Twisted-pair cable

B. Ethernet cable

C. Fiber-optic cable

D. Coaxial cable

Answer: Option (A) is correct.

Explanation:

Twisted pair cables are generally referred to as a type of cable which is made by laying two insulated cables together in a pattern which resembles a twisted knot and keeping these wires parallel. Twisted-pair cable is generally used for normal telephone service. This is a type of cables which generally have two conductors of a circuit serves the function of convalescing electromagnetic compatibility.