Which is the most common plant used as green manure in India?

From which plant is a liquid wax obtained that has properties equivalent to sperm whale oil?

$A$ system of rotating crops with legume or grass pasture to improve soil structure and fertility is called

One of the major $Basmati$ rice producing states of our country is

Green revolution is related to the increase in

Statement $A$: High-quality disease-free plants and animals are produced.
Reason $R$: Through animal husbandry and tissue culture,food production can be increased to meet the needs of the growing human population.
Which option is correct for Statement $A$ and Reason $R$?