Correct option is B
Option (b) is the correct meaning of the given idiom.
Method to one’s madness: This idiom means that while someone’s actions may seem chaotic or irrational, there is actually a logical plan or purpose behind them. (पागलपन में भी कोई तरकीब होती है)
Example: His room looks messy, but there's a method to his madness — he knows exactly where everything is.
Other similar idioms:
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Every cloud has a silver lining – Even bad things have a good side.
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A blessing in disguise – Something good that isn’t initially recognized.
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Don’t judge a book by its cover – Appearances can be misleading.