What is the name of the southernmost county seal in West Virginia?

The name of the southernmost county seal in West Virginia is Welch. This city serves as the county seat of McDowell County, which is located in the southern part of the state. Welch is known for its rich history and significance in the coal mining industry, playing a vital role in the development of the region.

In contrast, the other choices represent cities in West Virginia that are not located as far to the south as Welch. Harpers Ferry, while historically significant, is situated at the confluence of the Potomac and Shenandoah rivers in the northeastern part of the state. Martinsburg is located in the eastern panhandle, and Wheeling is situated in the northern area of West Virginia, along the Ohio River. Thus, Welch stands out as the southernmost point among these options.