The oldest members of the human lineage are the Australopithecines.

a. True

b. False

The correct answer will be option - true.

Explanation:

The evolution of humans can be just predicted on the basis of the evidence found like fossils which represented the ancestor of humans.

On the basis of these fossils, the oldest fossil found was the fossil which belonged to the Pliocene and Pleistocene epochs around 4.4 million to 1.4 million years ago (mya).

The fossil belonged to the species of the genus Australopithecines the most famous of which is Lucy. This fossil bear the characteristics of both humanlike and apelike characters traits like bipedalism, increased brain size and canine teeth. So they are considered the ancestors of the human lineage.

Thus, option-true is the correct answer.