IIT JAM 2025 Question 32: Classical assumptions and their violations

Which of the following is/are NOT the assumption(s) of Classical Linear Regression Model (CLRM)? (A) Variance of the dependent variable ($Y_i$) is greater than the variance of the explanatory variable ($X_i$). (B) The model is linear in both parameters and variables. (C) $Cov(Y_i,u_i)=0$, where $u_i$ is the error term. (D) $Cov(X_i,u_i)=0$, where $u_i$ is the error term.