Correct option is A
Option (a) is the correct meaning of the given idiom.
Idiom: “The whys and wherefores” – It refers to the reasons and explanations for something. (Hindi: किसी चीज़ का कारण और तर्क)
Example: He explained the whys and wherefores of the decision in the meeting.
Other related idioms and their meanings:
· “The nuts and bolts” – The practical details
· “Give the lowdown” – Provide the essential information
· “Come to the point” – Directly address the main issue