Order of SN1 reactivity (or carbocation stability) of given halides

1. A.
2. B.
3. C.
4. D.

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1. A.
   $A > C > D > B$
2. B.
   $B > D > C > A$
3. C.
   $A > B > C > D$
4. D.
   $D > B > C > A$

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1. A.
   (D) $<$ (A) $<$ (B) $<$ (C)
2. B.
   (C) $<$ (B) $<$ (A) $<$ (D)
3. C.
   (D) $<$ (B) $<$ (A) $<$ (C)
4. D.
   (C) $<$ (D) $<$ (B) $<$ (A)

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1. A.
2. B.
3. C.
4. D.

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1. A.
   IV $<$ III $<$ II $<$ I
2. B.
   III $<$ I $<$ II $<$ IV
3. C.
   II $<$ I $<$ III $<$ IV
4. D.
   I $<$ II $<$ III $<$ IV

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