Which statements is/are true about a homologous series? (A) Adiacent members of a group differ b...

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Which statements is/are true about a homologous series?
(A) Adiacent members of a group differ by a mass of 14
(B) Adjacent members of a group differ by one \( -\mathrm{CH}_{2} \) group
(C) Members of a homologous series can be prepared by the same general methods
(D) Members of a homologous series have the same physical and chemical properties
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