Concept:The visible spectrum is arranged by wavelength, with violet having the shortest wavelength and red having the longest.
Explanation:In the visible region, colours are ordered by increasing wavelength.
The order is: violet, indigo, blue, green, yellow, orange, red.
Violet lies at the shortest wavelength end of the visible spectrum.
Red lies at the longest wavelength end of the visible spectrum.
Therefore, the colours with the shortest and longest wavelengths respectively are violet and red.
Answer:Violet and red.
Correct option: C.