(i) False
If two line segments do not intersect, they may or may not be parallel.
(ii)False
If two rays do not intersect, they may or may not be parallel.
(iii) True
(iv)True
(v)False
We can produce a ray in one direction.
(vi)False
means A is fixed and B is not fixed. In other words, we can produce AB towards B.
means B is fixed and A is not fixed. In other words, we can produce B towards A.