Majority of people suffer from protein,vitamins and micronutrient deficiencies. Their food does not contain essential micronutrients specially:
$I$. iron
$II$. iodine
$III$. zinc
$IV$. vitamin-$A$
Which of the above are correct?

Which crops were introduced to India from the New World?

Apart from high yield,other main objectives of plant breeding are:

Assertion : Use of fertilizers greatly enhances crop productivity.
Reason : Irrigation is very important in increasing crop productivity.

Which of the following is a fungicide?

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 $\quad 75 \%$