Which of the following statements are true in the case of Pulse Code Modulation (PCM)?a) If the number of bits per sample is increased from n to n + 1; the S/Nq the ratio would be 6 dBb) The quantization noise depends on the sampling ratec) The main advantage of PCM is that it possesses better performance in the presence of noised) If the number of quantization levels increases from 4 to 64, the bandwidth increase by a factor of 4

• A. (a) and (b) are correct
• B. (a) and (c) are correct
• C. (a) and (d) are correct
• D. (b) and (c) are correct