Which among the following is the closest ancestor of modern human beings?

The correct option is A Neanderthal
Neanderthal man is considered to be the closest extinct relatives of modern human beings. They started to evolve around 1,30,000 years ago. Modern humans and neanderthals simultaneously branched out from a common ancestor, Homo erectus. Both humans and Neanderthals belong to the same genus, Homo, but different species. Neanderthals had an erect posture, physical appearence and genetic composition similar to modern human beings.