Which of the following is a vestigial tooth found in humans?

Which of the following is most closely related to humans?

Java ape man ($Homo$ $erectus$ $erectus$) is considered to have existed in which region?

The first probable fossil of man was

Which of the following is related to the cultural evolution of humans?

$A$: The brain reaches between $75$ and $80$ percent of its adult size within the first two years,and its full size at the age of $6$ years.
$R$: From an evolutionary point of view,the human gestation period is believed to be shortening.