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How many of the following statements are...

How many of the following statements are correct?
i) In cyclobutadiene two unpaired `pi` electrons are Present in `pi` nonbonding molecular orbitals which are responsible for destabilization of cyclobutadiene.
ii) Cyclopentadiene pKa value is less than that of cycloheptatriene
iii) Dipole moment of `I^(st)` Structure is more than `II^(nd)` Structure in the following

iv) Cycloheptatrienyl bromide is less soluble in `H_(2)O` than in non-polar solvent
v) Due to anti aromatic nature [4]-annulene is less stable than [6]-annulene

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The correct Answer is:
4
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