Which of the following statement (s) is/are correct

1.	Which of the following statement (s) is/are correct
Answer» E2 isa concerted reaction in which bonds break and new bonds form at the same time in a single step Order of reactivity of alkyl halides towards E2 dehydrohalogenation is found to be `3^(ul@) gt 2^(ul@) gt 1^(ul@)` InE2 reaction both `BETA` hydrogen and leaving group should be antiperiplanar. In E2 ELIMINATION DIFFERENT stereoisomers (diastereomer) converts into different stereo product . Answer :A::B::C::D

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