Which helicopter supports the executive transport mission other than the VH-3D?

The VH-60N Night Hawk is specifically designed for executive transport missions, including the transportation of high-ranking officials such as the President of the United States. It is a variant of the Black Hawk helicopter and is equipped with advanced communication and defensive systems to ensure the safety and security of its passengers. This makes it an appropriate choice for executive transport alongside the VH-3D.

In contrast, the AH-64 Apache is primarily designed for attack missions and is not used for executive transport; the CH-53 Sea Stallion is a heavy-lift transport helicopter focused on troop or equipment transport and search-and-rescue missions; the MH-60R Seahawk is mainly used in anti-submarine warfare and maritime operations. Thus, none of these helicopters fulfill the same executive transport role that the VH-60N does, making it the correct answer.