Eucalyptus which grows abundantly in the Nilgiri hills of Tamil Nadu is used as medicine for ________.
A. Curing fever
B. Curing cold
C. Curing malaria
D. None of these

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Hint: Eucalyptus is a huge evergreen tree. It achieves a height of 300 plus feet. Leaves of the tree on juvenile shoots are different, sessile, and covered with a bluish and white bloom. The adult leaves are alternate, lanceolate, and are 6-12 inches long and 1-2 inches wide.

Complete step-by-step solution:
Tamil Nadu is wealthy in flora and fauna and some of its important wildlife sanctuaries like Mudumalai and Annamalai, are spotted in the Western Ghats. These hills are favorable havens for elephants, tigers, bison, monkeys, and deer. Of the 3,000 and more plant varieties found in Tamil Nadu, a bulk is established in the mixed deciduous forests of this area.
One of the most noteworthy flowers is the Kurinji of Kodaikanal, which blooms one time in 12 years. Cinchona, from which the anti-malarial drug quinine is taken out, and the medicinal eucalyptus grow abundantly in the Nilgiri hills. Eucalyptus ripen in the Nilgiri hills and is majorly utilized for curing a cold. It is popularly recognized in India as Nilgiri taila. India has confirmed that Eucalyptus oil works as an effective expectorant and relaxes phlegm and mucous residues in the nasal and respiratory passages.
 Hence it is clear that Eucalyptus is used as a medicine to cure a cold.

Thus, option (B) is correct.

Note: Tamil Nadu is wealthy in flora and fauna and some of its crucial wildlife sanctuaries like Mudumalai and Annamalai, are positioned in the Western Ghats. These hills are excellent havens for elephants, tigers, bison, monkeys, and deer. Of the 3,000 and more plant varieties found in Tamil Nadu, a bulk is found in the mixed deciduous forests of this area.