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Choose the correct option

I. Transition metals are characterised by variable oxidation state

II.  Elements of IB & IIB are transition elements 

III.  Elements of gp1 exhibit only +1 O.S

IV.  Group 17 contains only gases 

(a)  TTFF

(b)  TFTF 

(c)  TTTF 

(d)  TTTT

1 Answer

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Best answer

Correct option  (c)  TTTF

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