Q2

Every relation in $\text{3NF}$ is also in $\text{BCNF}$

A relation $\text{R}$ is in $\text{3NF}$ if every non-prime attribute of $\text{R}$ is fully functionally dependent on every key of $R$

Every relation in $\text{BCNF}$ is also in $\text{3NF}$

No relation can be in both $\text{BCNF}$ and $\text{3NF}$