Determine the correctness or otherwise of the following $\text{Assertion (a) and Reason (r)}$.
$\text{Assertion:}$ $\text{UPGMA}$ method produces ultrametric tree.
$\text{Reason:}$ Sequence alignment is converted into evolutionary distances in $\text{UPGMA}$ method.
- Both $(a)$ and $(r)$ are true and $(r)$ is the correct reason for $(a)$
- Both $(a)$ and $(r)$ are true and $(r)$ is not the correct reason for $(a)$
- $(a)$ is true but $(r)$ is false
- $(a)$ is false but $(r)$ is true