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

Which region is considered the secondary center of origin for coffee production?

Which are the top five cereals in the world in terms of annual production?

Statement $P$: New varieties are developed through processes like grafting,tissue culture,cloning,and hybridization.
Statement $Q$: It provides necessary information regarding the identification of collected,certified,and newly discovered plant specimens.

$A$ : Hybrid seeds have to be produced every year because seeds collected from hybrid plants,if sown subsequently,do not maintain hybrid characters.
$R$ : Hybrid seeds show segregation of traits.

In a country like India,what is required for proper human nutrition in addition to milk?