The law of triad is applicable to a group of a)`Cl, Br, I` b)C,N,O c)`Na,K,Rb` d)`H,O,N`
The law of triad is applicable to a group of
a)`Cl, Br, I`
b)C,N,O
c)`Na,K,Rb`
d)`H,O,N`
A. C,N,O
B. Cl,Br, I
C. Na,K,Rb
D. None of these
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