Three discs A, B and C having radii 2 m, 4 m and 6 m respectively on coated with carbon black on their outer surfaces. The wavelength corresponding to maximum intensities are 300 nm, 400 nm and 500 nm respectively. The power radiated by them are \[{{Q}_{A}},\,{{Q}_{B}}\] and \[{{Q}_{C}}\] respectively

• A. \[{{Q}_{A}}\] is maximum
• B. \[{{Q}_{B}}\] is maximum
• C. \[{{Q}_{C}}\] is maximum
• D. \[{{Q}_{A}}={{Q}_{B}}={{Q}_{C}}\]