Amniocentesis is used for determining
Heart disease
Brain disease
Hereditary disease of the embryo
All of the above
The minimum number of females per $1000$ males are found in
Number of females is more than males in
Match the following columns
Column-I | Column- II |
$(A)$ Pill | $(1)$ Intra uterine device |
$(B)$ Condom | $(2)$ Prevents ovulation |
$(C)$ Vasectomy | $(3)$ Prevents sperms from reaching to cervix |
$(D)$ Cu - T | $(4)$ Semen contains no sperms |
$A$ : Every sixth person in the world is an Indian.
$R $: Life expectancy depends upon average life span
Scientificstudy of human population is called