1.

1). Only a and b2). Only b and c3). Only c and d4). Only d and a

Answer»

Energy is a noun and has TWO meanings:

(i) the strength and VITALITY required for SUSTAINED physical or mental activity.
(ii) power derived from the utilization of physical or chemical resources, especially to provide light and heat or to work machines.$

Now let us look at the meanings of the given words:
Power => the ability or capacity to do something or act in a particular way.
Lethargy => a lack of energy and enthusiasm.
Indolence => avoidance of activity or exertion; laziness.
Activity => the condition in which things are happening or being done.$

Thus from the provided meanings it is clear that (a) and (d) are synonymous to the word 'energy' while (b) and (c) are antonyms. Hence option 2 is the correct answer.$



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