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.

1. Both $(a)$ and $(r)$ are true and $(r)$ is the correct reason for $(a)$
2. Both $(a)$ and $(r)$ are true and $(r)$ is not the correct reason for $(a)$
3. $(a)$ is true but $(r)$ is false
4. $(a)$ is false but $(r)$ is true