Which of the following is considered the most primary and essential need among the basic requirements of humans?

Select the correct match for $X$ and $Y$:

Column $X$	Column $Y$
$(1)$ Worker	$(P)$ Sterile female
$(2)$ Queen	$(Q)$ Fertile female
$(3)$ Drone	$(R)$ Fertile male
$(4)$ Hilsa	$(S)$ Edible marine fish

The world's $P$ livestock is possessed by $Q$ and the contribution to the world farm produce is $R$.
$\quad P\quad\quad Q\quad\quad\quad\quad\quad R$
$(A)$ $70 \%\quad$ India and China $\quad 25 \%$
$(B)$ $70 \%\quad$ India and America $\quad 25 \%$
$(C)$ $30 \%\quad$ India and China $\quad 75 \%$
$(D)$ $30 \%\quad$ India and America $\quad 75 \%$

The toxicants which kill the pests on coming in direct contact are known as

Which three crops contribute the most to global food production?

Which of the following pesticides have been successfully used in the control of locusts and grasshoppers in India?