Fill in the blank with the correct idiom from the options given below:-

Ravi is _____ on getting the much coveted job.

over the moon

The correct answer is Option (3) → over the moon

Ravi is over the moon on getting the much coveted job.

Explanation:
The idiom "over the moon" means extremely happy or delighted. Since Ravi has secured a much-coveted job, it makes sense that he is very happy about it.

Other options do not fit:

• on the fence – undecided or neutral

• under the weather – feeling unwell

• barking up the wrong tree – pursuing a mistaken or misguided course of action