Explanation:

The contour interval is the vertical distance between two consecutive contour lines on a map. It represents the change in elevation between those lines. The suitable contour interval for a map depends on the scale of the map and the level of detail required.

Scale:
The scale of a map indicates the ratio of a distance on the map to the corresponding distance on the ground. In this case, the scale is given as 1:10,000, which means that 1 unit on the map represents 10,000 units on the ground.

Contour Interval Calculation:
To determine the suitable contour interval, we need to consider the level of detail required and the scale of the map.

Level of Detail:
The contour interval should be chosen such that it provides enough detail to accurately represent the topography of the area being mapped. A smaller contour interval will result in more contour lines, providing greater detail. However, if the contour interval is too small, the map may become cluttered and difficult to read.

Scale:
The scale of the map also affects the choice of contour interval. A larger scale map, such as 1:10,000, provides a greater level of detail compared to a smaller scale map. Therefore, a larger contour interval can be used without sacrificing accuracy.

Conclusion:
In this case, the suitable contour interval for a map with a scale of 1:10,000 would be 5 m. This interval provides a reasonable level of detail for a map of this scale without overcrowding the map with contour lines. It allows for accurate representation of the topography while maintaining readability.

Therefore, the correct answer is option B) 5 m.