A. Visible Light communication (VLC)
B. In-visible Light communication (INLC)
C. Ultra Light communication (ULC)
D. Visible Power communication (VPC)

Solution

A. Visible Light communication (VLC)

Explanation

LiFi (light fidelity) is a bidirectional wireless system that transmits data via LED or infrared light. It was first unveiled in 2011 and, unlike wifi, which uses radio frequency, LiFi technology only needs a light source with a chip to transmit an internet signal through light waves.