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human growth hormone

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heymayank08 Really wants to Beat The GMAT!
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human growth hormone Post Sat Apr 14, 2012 9:28 pm
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  • Lap #[LAPCOUNT] ([LAPTIME])
    The human growth hormone, made by the pituitary gland, is secreted during sleep in higher concentrations than when awake.
    (A) during sleep in higher concentrations than when awake
    (B) when sleeping in higher concentrations than waking hours
    (C) in higher concentrations during sleeping than waking
    (D) in higher concentrations during sleep than during waking hours
    (E) in higher concentrations when asleep than when awake

    OA: D

    pls explain :B

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    sam2304 GMAT Titan
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    Post Sat Apr 14, 2012 10:45 pm
    Relative pronouns like 'when' needs a noun to modify it.

    A/B - Usage of when is wrong.
    C - during sleep is the right usage
    E - Similar to A/B, Who is asleep ? we need the noun here to make use of when. 'When people are awake' - This structure is right here people is the noun, but in the actual sentence it is missing and it seems the harmone is asleep if we were to link with a noun and that is wrong.

    IMO D.

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    Post Sun Apr 15, 2012 12:01 am
    Down to D/E and D seems awkward with "during waking" Sad

    IMO: Hard to choose between D/E Very Happy

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