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In how many of the following reactions r...

In how many of the following reactions regioselectivity can be observed.
(I). `CH_(3)-overset(CH_(3))overset(|)(C)H-CH_(2)-Ohunderset(Delta)overset(con" "H_(2)SO_(4))to`
(II). `CH_(3)-CH_(2)-CH_(2)-underset(OH)underset(|)(C)H_(2)underset(Delta)overset(Al_(2)O_(3))to`
(III). `CH_(3)-overset(CH_(3))overset(|)(C)-CH_(2)-CH_(2)-CH_(3)underset(Delta)overset(alc.KOH)to`
(IV). `CH_(3)-CH_(2)-underset(Br)underset(|)(C)H-CH_(2)-CH_(3)underset(Delta)overset(Alc.KOH)to`

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