Select the most appropriate meaning of the given idiom.

Snake in the grass

Select the most appropriate meaning of the given idiom.
 Cover up 

Select the correct option of the idiom/phrase.

"A bolt from the blue"

Select the most appropriate meaning of the given idiom.

Be under a cloud

Select the most appropriate meaning of the given idiom.

Sit on the fence

Select the most appropriate meaning of the underlined idiom in the given sentence.

I had never seen him lose his temper, and he governed our company with an iron hand.

In the following question, two columns are given containing three phrases each. In the first column, phrases are A, B, and C, and in the second column, the phrases are D, E, and F. A phrase from the first column may or may not connect with a phrase from the second column to make a grammatically and contextually correct sentence. There are five options, four of which display the sequence(s) in which the phrases can be joined to form a grammatically and contextually correct sentence. If none of the options forms a correct sentence after combination, select ‘None of these’ as your answer.

Select the most appropriate meaning of the given idiom.

Achilles’ Heel