The 'Kattha' (catechu) used with betel nut is obtained from which part of the Acacia tree?

Match Column-$I$ with Column-$II$:
Column-$I$ (Forest Type) | Column-$II$ (Dominant Tree Species)
$(I)$ Tropical Rain Forests | $(a)$ $Shorea robusta$
$(II)$ Tropical Deciduous Forests | $(b)$ $Quercus$
$(III)$ Temperate Broad-leaf Forests | $(c)$ $Cedrus deodara$
$(IV)$ Temperate Coniferous Forests | $(d)$ $Dipterocarpus$

Which of the following plants is primarily used as a source of lubricant?

Which of the following plants yields the medicine used for pupil dilation?

The botanical name of sweet corn is:

Commercial cutch is obtained from the heart wood of