In the given options, $Ramapithecus$ is the most primitive ancestor of man Edward Lewis(1932) obtained fossil of $Ramapithecus$ from Pliocene rocks of Shivalik hills of India. $Ramapithecus$survived about 14$-$15 million years ago during late Miocene to Pliocene. $Ramapithecus$became extinct about 7$-$8 million years back.