Based on the phylogenetic tree above, Human and Rhesus monkey are least closely related (option D)
Why is this correct?
The most recent common ancestor shared between the organisms is the unnamed common ancestor at the base of the tree which is Chimpanzee for human and Baboon for Rhesus.
The evolutionary journey within the primate lineage paved the way for the emergence of Homo sapiens as a distinct species in the hominid family.
This intricate process of human evolution encompasses the transformation that ultimately set humans apart and is part of the broader continuum that also encompasses the great apes within the hominid family.