The correct answer is: Only 1.
Most of the rivers in Jharkhand are not navigable because they are not wide enough. The course of river is not wide, but having more depth is not a reason for a river to be navigable.
A navigable river is a river that can be used for transportation by watercraft. The width of a river is one of the most important factors in determining whether or not it is navigable. A river must be wide enough to allow for the passage of boats and other watercraft.
The depth of a river is also important, but it is not as important as the width. A river can be deep enough for navigation even if it is not very wide. However, a river that is not wide enough will not be navigable, no matter how deep it is.
The rivers in Jharkhand are not wide enough for navigation. This is because they are located in a mountainous region. The mountains narrow the valleys, which makes the rivers narrower. As a result, the rivers in Jharkhand are not navigable.