Some idioms/phrases are given below together with their meanings. Choose the correct meaning of the idiom/phrase: "$A$ load of cobblers".

Some idioms/phrases are given below together with their meanings. Choose the correct meaning of the idiom/phrase: "To hit the nail right on the head".

Choose the alternative which best expresses the meaning of the highlighted idiom/phrase.
The class could not $keep\, a\, straight\, face$ on hearing the strange pronunciation of the new teacher.

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In his youth, he was practically $rolling\, in\, money$.

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Do not trust a man who $blows \, his \, own \, trumpet$.

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The old beggar $ran\, amuck$ and began to throw stones at the passerby.