In the mathematical model for the quantization error e_q (n), to carry out the analysis, what are the assumptions made about the statistical properties of e_q (n)? 1. The error e_q (n) is uniformly distributed over the range — ∆ /2 < e_q (n) < ∆ /2. 2. The error sequence is a stationary white noise sequence. In other words, the error e_q (m) and the error e_q (n) for m≠n are uncorrelated. 3. The error sequence {e_q (n)} is uncorrelated with the signal sequence x(n). 4. The signal sequence x(n) is zero mean and stationary.

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