The largest area under cultivation in India is for which of the following crops?

Reserpine is used for $......$.

From which part of $Atropa$ $belladonna$ is the drug belladonna obtained?

Bowstring hemp is obtained from:

What is the genomic constitution of old world varieties of cotton $(Gossypium \, arboreum, G. herbaceum)$ and new world varieties $(G. hirsutum, G. barbadense)$?

The sugar-yielding part of sugarcane is: