Consider the following statements The amplitude of an FM wave is constantFM is more immune to noise than AMFM broadcasts operate in upper VHF and UHF frequency rangesFM transmitting and receiving equipments are simpler as compared to AM transmitting and receiving equipments Which of the above are correct?

• A. 1, 2, 3, 4
• B. 1, 2, 3
• C. 2, 3, 4
• D. 1, 3, 4