Which of the following types of ethers cannot be sythesized by Williamson synthesis ?
A. `H_(3)C-overset(CH_(3))overset(|)underset(CH_(3))underset(|)C-O-overset(CH_(3))overset(|)underset(CH_(3))underset(|)C-CH_(3)`
B. `H_(3)C-overset(CH_(3))overset(|)underset(CH_(3))underset(|)C-O-overset(CH_(3))overset(|)underset(CH_(3))underset(|)C-H`
C. `C_(6)H_(5)-O-C_(6)H_(5)`
D. None of these
