Among six persons A, B, C, D, E, F, there are 3 married couples of which A, C, E are husbands; B, C, D are cousins and B is not wife of A. Then husband of B is

Let us break down the statements logically:
1. There are 3 married couples, which means there are 3 husbands and 3 wives.
2. We are given that $\text{A}$, $\text{C}$, and $\text{E}$ are husbands (males).
3. Therefore, the remaining three individuals—$\text{B}$, $\text{D}$, and $\text{F}$ —must be the wives (females).
4. We are told that $\text{B}$, $\text{C}$, and $\text{D}$ are cousins. Because $\text{C}$ is a cousin to $\text{B}$ and $\text{D}$, $\text{B}$ cannot be married to $\text{C}$ (as they are siblings/cousins).
5. The problem explicitly states that $\text{B}$ is not the wife of $\text{A}$.

Since $\text{B}$ cannot be married to $\text{A}$ or $\text{C}$, the only remaining available husband for $\text{B}$ is $\text{E}$.