Which of the following is the topmark for the Lateral Starboard Hand Mark in Region B?

The topmark for the Lateral Starboard Hand Mark in Region B is represented by a Single Green Cone. This is aligned with the IALA Maritime Buoyage System's conventions for marking channels and navigational hazards. The green cone indicates the direction of safe passage and is used to signify that vessels should keep to the starboard side of the channel when navigating.

In this system, the use of geometric shapes helps differentiate between types of marks, with the cone shape specifically denoting that a mark is for starboard lateral navigation. This shape is easily identifiable and universally understood in maritime navigation. Therefore, recognizing a green cone as the topmark for the starboard hand buoy aids mariners in making informed and safe navigational decisions while they are at sea.