Question

Tell the odd one out. Give proper explanation :
(1) The volt, The ohm, The ampere, The dioptre.
(2) - NH,, -COOH, - SO4, - Br
(3) Methane, Ethane, Propene, Propane, Butane.
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Answer 1

Answer:

in the first one -- the dioptre

in the second one -- Br

nd in the third one -- propene