Which of the following is the closest relative of humans?

Modern $Homo$ $sapiens$ arose:

In the context of the history of human evolution,which of the following sequences is correct?

According to the traditional classification by Blumenbach,how many total races of man are recognized?

Given below are some stages of human evolution. Arrange them in correct sequence (Past to Recent):
$A$. Homo habilis
$B$. Homo sapiens
$C$. Homo neanderthalensis
$D$. Homo erectus
Choose the correct sequence of human evolution from the options given below:

Thick skull,cranial capacity about $1075$ c.c.,low forehead,absence of chin,and large canines were present in: