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Which of the following is/are true about...

Which of the following is/are true about carbohydrates.(i) These are energy giving substances,(ii) These are tested with Iodine solution,(iii) These release chemical energy during oxidation,(iv) These are rich in Potato and food grains

A

i and ii only

B

i, ii and iv only

C

i, iii and only

D

all of these

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