For which of the following is capillarity not the only reason?

a) Blotting of ink
b) Rising of underground water
c)Spread of water drop on a cotton cloth
d)Rising of water from the roots of a plant to its foliage


Ans -[B]
This question was asked in UPSC,1999. The catch is that the question is asking “not the only reason”. Hence, option B is the most suitable one as rise of underground water happens due to many other reasons as well e.g. recharge due to high rainfall, recharge due to irrigation etc.

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