Select the most appropriate idiom for the highlighted segment in the given sentence.
Sarvana failed in the examination last week and is in extreme depression these days.

Correct option is B

Option (b) is the correct meaning of the given idiom.
In the doldrums: A state of depression, inactivity, or low spirits. It often refers to emotional gloom or lack of progress.
(Hindi meaning: उदासी में, निराशाजनक स्थिति में)
Example: After losing the project, he was in the doldrums for weeks.
Other options:
· (a) In the lurch: To leave someone in trouble without support (किसी को बीच में छोड़ देना)
· (c) In cold blood: Without emotion or pity (निर्दयता से)
· (d) In the red: In debt or financial loss (नुकसान में)