( I ) HClO is stronger acid than HBrO
( II ) Greater is the electronegativity of the halogen, greater will be the X-O bond polarity and greater will be the O-H bond polarity hence more easily the H+ ion will be released.
Correct statements are
I and II both are true
Greater is the electronegativity of the halogen, greater will be attraction of electron pair towards it and hence more easily the H+ ion will be released from O-H bond. HClO is stronger acid than HBrO