The correct answer is - B. II and III.
The geometric boundaries and the subsequent boundaries are boundary types that are the least likely to result in a conflict. The reason for that is that both of these types of boundaries have taken into consideration the type of population that is living in an area and its interests, thus they are not boundaries that have been forcefully put by someone else.
The geometric boundaries are boundaries that usually go through sparsely populated areas like deserts, dense forests, bodies of water, so they do not cause any problems as usually there's little to no population on the places where they are set.
The subsequent boundaries are boundaries that are set after an area has been settled. Once the settlements are established and the people are living in a particular area the boundary is set in accordance to the population there, thus avoiding any reason for a conflict.
