(ii) 
(iii) 
(iv) 
(a)
(i) (b) (i), (ii) and (iii)
(c) (ii), (iii) and
(iv) (d) (i) and (iv)
Answer:
(a) The reaction
in which oxidation as well as reduction, occur upon same atom simultaneously is
known as disproportionation reaction.
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