Idiom
Blood is red in colour due to the presence of ________

Haemoglobin
Hemocyanin
Chlorophyll
Cytochrome

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Idiom
For each of the following sentences four alternatives are given. You are required to choose the correct meaning of the idiom or phrase given or underlined in the sentence. Some people have a habit of wearing their heart on their sleeve.

wasting their time on unnecessary details
avoiding being friendly with others
saying something which is not to be taken seriously
exposing their innermost feelings to others

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