Growing crop plants in monoculture results in ........

Select the mismatched pair from the following:

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 $\quad 75 \%$

One of the basic elements considered in the Green Revolution is . . . . . . .

Which of the following plants is commonly used as green manure?

Pulses are a rich source of which of the following?