Q. Find the correctly matched one

A
Semiconductor material Wavelength Colour Vf GaAsP 585-595nm Yellow 1.8v GaAsP:N 630-660nm Red 2.2V AlGaP 550-570nm Green 3.5V
B
Semiconductor material Wavelength Colour Vf GaAsP:N 585-595nm Yellow 2.2V GaAsP 630-660nm Red 1.8V AlGaP 550-570nm Green 3.5V
C
Semiconductor material Wavelength Colour Vf GaAsP 630-660nm Red 1.8v GaAsP:N 585-595nm Yellow 2.2V AlGaP 550-570nm Green 3.5V
D
Semiconductor material Wavelength Colour Vf GaAsP:N 585-595nm Yellow 1.8V GaAsP 630-660nm Red 3.5V AlGaP 550-570nm Green 2.2V
Solution:

The actual colour of a light emitting diode is determined by the wavelength of the light emitted, which in turn is determined by the actual semiconductor compound used in forming the pn junction during the manufacture.

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