The rubber we obtain from the rubber plant is –
A. Plant food
B. Plant tissue
C. Plant waste
D. Plant fruit

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Hint:The latex of the plant Havea brasiliensis is extracted. This is called natural rubber.
The plant Havea brasiliensis is a plant of the family Euphorbiaceae.

Complete answer: It is a tall deciduous tree which grows up to a height of nearly 43 m (141 ft) in the wild, but cultivated trees are usually much smaller. It is because drawing off the latex restricts the growth of the tree. The trunk is cylindrical which may have a swollen, bottle-shaped base. The bark is brown, and the inner bark oozes latex when damaged.
Latex is extracted from the rubber tree by cutting a small part of the bark of the tree. The cut or injury is made such that it runs only as deep into the bark as to expose the inner layer which has resin. Then, a bucket is tied just beneath the cut so that all the latex that falls from the injury gets collected in the bucket.
The resin is actually a waste product for the plant. It is a characteristic feature in the plants of the family Euphorbiaceae.

So, the answer is option C.

Note: Havea brasiliensis is the most economically important member of the genus Hevea because the milky latex extracted from this tree is the primary source of natural rubber. The latex is a resin, which is not of a need for the plant. So, a waste product of the plant is highly useful for humans.