The correct option is B 400 ml - 500 ml
The Australopithecus, Lucy, who was discovered in Ethiopia, was found to have a brain size of around 400 ml to 550 ml. The brain sizes of the Homo Habilis and Homo Erectus were larger in size as compared to the Australopithecus. The brain size of present-day humans would range from 900 to 2100 ml, with a global average of 1,349 ml.