i)False, infinite number of lines can pass through a single point.
ii)False, only one straight line can pass through two distinct points. Say points are P and Q.
iii)True, a terminated line can be produced indefinitely on both the sides.
iv)True, since, radii of congruent (equal) circles are always equal i.e., if you superimpose the region bounded by one circle on the other, then they coincide.
v)True, if AB = PQ and PQ = XY i.e. XY = PQ
Then, AB = XY.