Forums > Click 2 Win > Win free JAZZ Card! General Knowledge Quiz (17-Sept-2014)

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Subject : Win free JAZZ Card! General Knowledge Quiz (17-Sept-2014) (closed)

The main constituent of haemoglobin is ??

a) Chlorine
b) Iron
c) Calcium
d) None of above

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Posted on September, 17 2014 11:55:03 AM