$A$ : Every sixth person in the world is an Indian.
$R $: Life expectancy depends upon average life span
Assertion and Reason both are correct and also correct explanation.
Assertion and Reason both are correct but not explanation of assertion.
Assertion is correct, but Reason is incorrect.
Both Assertion and Reason are incorrect.
On which day, world population touched $5 ^{th}$ billion?
Per year growth in India's population according to $1991$ census is
Syphilis is an infectious bacterial disease caused by Treponema pallidum with $3$ stages
$(A)$ Infectious painless ulcers on the genitals $\quad$$(i)$ First
$(B)$ Blindness, heart trouble,aortic impairment $\quad$$(ii)$ Second
$(C)$ Skin lesions, hairloss,swollen joints $\quad$$(iii)$ Third
Which of the following is the correct match between the symptoms and stage?
According to $1991$ census, the number of females per $1000$ males is