What forms white light? a) combination of all the wavelengths of ultraviolet light, b) combination of all the wavelengths of visible light, c) absorption of electromagnetic rays, d) absorption of infrared rays

The right option is B) Combination of all the wavelengths of visible light
White light is formed when there is mixture of all the colors of the visible light spectrum (ROYGBIV). White light is perceived when all the wavelengths of the visible light spectrum strike the eye at the same time. The sensation of white is not the result of a single color of light. 

Diagrams for sure 67(8? ; 4