v) For any two individuals sitting "n" places away from each other, the number of persons in between shall always be "n-1". So if it is given that A sits 3 places away from B, it implies there are 2 persons sitting between A and B.
iii) Whenever there are odd numbers of persons sitting in a circle, no one sits exactly opposite anybody. In case of even number of persons, people sitting half the number of total persons away from each other will be opposite each other. Eg. If there are 8 persons sitting in a circle, any two persons sitting 8/2 = 4 places away from each other shall be opposite each other.