Select the option that can be used as a one-word substitute for the given group of words.
Sharpness and accuracy of judgment

Correct option is A

The correct one-word for the given group of words is (a) Acumen.
Acumen: The ability to make quick and accurate decisions or judgments; mental sharpness. (तीव्र बुद्धि, निर्णय क्षमता)
Example: Her business acumen helped the company grow rapidly.
Meanings of the other options:
· (b) Estimation: A rough calculation or guess. (अनुमान)
· (c) Experience: Knowledge gained by doing things. (अनुभव)
· (d) Knowledge: Information and skills acquired. (ज्ञान)