Population density of India is
$215$ / sq. km
$200$ / sq. km
$400$ / sq. km
None of the above
Human population after $17$th century $A.D.$ is thought to be in
The most densely populated city in India is
Which of the following cannot be detected in a developing foetus by amniocentesis?
Oral polio vaccine and hepatitis first dose is given to a child at