The following sentence has three blanks. There are five options each containing two words to fill in the blanks. While the first word must fill both the first and the second blank, the second word must fill the third blank to make it a meaningful sentence

Interestingly, scientists have argued that Homo floresiensis shows physical features that are __________ of those found in australopithecines. But other researchers have argued that the Hobbits were __________ of Homo erectus but that some of their anatomy _________ to a more primitive state.