Amino acid sequences of cytochrome $c$ and ribulose $5$-phosphate epimerase from $40$ organisms were chosen and phylogenetic trees were obtained for each of these two protein families.
Determine the correctness or otherwise of the following Assertion [$a$] and the
Reason [$r$].
Assertion [$a$]: The two trees will not be identical
Reason [$r$]: The nature and frequency of mutations in the two families are different
- Both [$a$] and [$r$] are true and [$r$] is the correct reason for [$a$]
- Both [$a$] and [$r$] are true but [$r$] is not the correct reason for [$a$]
- Both [$a$] and [$r$] are false
- [$a$] is false but [$r$] is true.