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Dear student,
Statement (i) and (ii) are correct. Because HCl is a Strong acid so, it ionises completely in water to produce Hydrogen ion (H+) and chloride ion (Cl-).Now, hydrogen ions produced will combine with a water molecule to produce Hydronium ions.
HCl  H+ + Cl-H+ + H2O H3O+
and thus the statement (iii) and (iv) proves to be incorrect.
Hence, option (A) is correct answer.

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