The man like primates walked in eastern Africa around 3-4 mya. This belief was supported by

The chronological order of human evolution
from early to the recent is
1. Australopithecus $\to$ Ramapithecus $\to$ Homo
habilis $\to$ Homo erectus
2. Ramapithecus $\to$ Australopithecus $\to$ Homo
habilis $\to$ Homo erectus
3. Ramapithecus $\to$ Homo habilis
$\to$ Australopithecus $\to$ Homo erectus
4. Australopithecus $\to$ Homo habilis
$\to$ Ramapithecus $\to$ Homo erectus