A 1.0 kHz tone is used to generate both an AM and an FM signal. Unmodulated carrier amplitude is the same for both AM and FM. The modulation index β of FM is 12 . If the frequency components at (fc ± 1000)Hz have the same magnitude in AM as well as FM, then the modulation index of AM is a. 48.00 b. 12.00 c. 24.00