Correct option is D
The correct meaning of the idiom is (d) to be successful in life.
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Going places:
This idiom is used to describe a person who is progressing rapidly and is likely to achieve success in career or life. It does not refer to physical travel but to personal or professional advancement.
(Hindi meaning: जीवन में आगे बढ़ना / सफल होना)
Example: She is young, talented, and definitely going places.
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Explanation for choosing the correct answer:
In the given sentence, working hard is directly linked to future success. Hence, the idiom clearly implies achieving success in life rather than literal travel.
Meanings of all the other given options:
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(a) to earn big money: Money may come with success, but it is not the direct meaning.
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(b) to be a busy traveller: This refers to frequent travel, which is not implied.
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(c) to visit many places: This is a literal meaning and not the idiomatic sense.
Thus, the correct option is (d) to be successful in life.