Answer: Option A
:
A, B, and D

(i) A perpendicular drawn from the centre of the circle acts as a perpendicular bisector to the chord.

(ii) Congruent arcs of a circle subtend equal angles at the centre. These angles are equal but not always a right angle. A right angle is subtended only when the arc is a semicircle.

(iii) Right angles will be subtended by congruent arcs only when they are semicircles.

(iv) If two chords are drawn at a same distance from the centre of a circle, they will be equal in length.