Select the most appropriate idiom that can substitute the italicised words in the given sentence.

He was sacked from his job because of a grave error on his part.

The correct answer is: Himalayan blunder

Key Points

• 'Grave' is used as an adjective, 'too'. It can describe something serious, or of great importance.
• 'Error' means a mistake or the state or condition of being wrong in conduct or judgment.
• Let us look at the meaning of the given idioms to find out the most appropriate one.
  • Raining cats and dogs: A heavy downpour, rain coming down very quickly and hard. (एक भारी मंदी, बारिश बहुत जल्दी और कठिन हो रही है)
  • Minding one’s p’s and q’s: Practice good manners, and be precise and careful in one's behavior and speech. (अच्छे व्यवहार का अभ्यास करें, अपने व्यवहार और वाणी में सटीक और सावधान रहें)
  • Picking holes in one’s coat: To criticize someone by pointing out the flaws in their work. (किसी के कार्य में दोष बताकर उसकी आलोचना करना)
  • Himalayan blunder: A very serious mistake or error. (बहुत गंभीर गलती या त्रुटि)
• Therefore, from the meaning of the aforementioned idioms, it is clear that "Himalayan blunder" is the most appropriate idiom for "Grave error."

​Hence the correct answer is option 4.

Substituted sentence: He was sacked from his job because of a Himalayan blunder on his part.