RRB Technician Grade 1 Model Paper 1

Concept:RGB LED is a single package that combines three primary colour LEDs: red, green, and blue.Explanation:RGB stands for Red, Green and Blue.An RGB LED consists of exactly one red LED, one green LED, and one blue LED.These three colours mix in different intensities to produce a wide range of colours.Each colour channel has $256$ intensity levels, ranging from $0$ to $255$.So the total number of possible colour combinations is $256 \times 256 \times 256 = 256^3 = 2^{24}$.Hence, the correct matching option is C.Answer:One red, one green and one blue LED (Option C).