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Option 2 : Cytokines helps a person fall sleep, giving the immune system energy to defend the body against illness.
Option 2 is the correct answer as it is the only option which does not talk about the effects of sleep deprivation on a human. It talks about cytokines which helps a person fall asleep, but this statement does not talk about any effects of sleep deprivation thus is satisfying the question asked.
Whereas the other 4 statements are talking about the effects such as causing respiratory diseases,increases insulin levels, cardiovascular diseases and so on.
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