Correct option is D
Option (d) is the correct meaning of the given idiom.
Jump the gun: To act prematurely or do something before the appropriate time. (समय से पहले कुछ कर देना)
Example: She jumped the gun by announcing the results before they were officially confirmed.
Other related idioms:
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Bite the bullet: To face a difficult situation bravely.
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Go the extra mile: To make an extra effort.