Explanation
Correct Answer: (b) 1-S, 2-R, 3-Q, 4-P
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1-S (Call out - A Doctor): To "call out" a professional like a doctor means to summon them for an emergency or a home visit.
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2-R (Stands in for - A Colleague): To "stand in for" someone means to take their place or do their job temporarily. A colleague stands in for another colleague.
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3-Q (Send down - A Criminal): In British English, to "send down" means to sentence someone to prison.
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4-P (Send off - A Footballer): In sports, a referee "sends off" a footballer by showing a red card for a serious foul.
