This tag lets you loop through regions:
{{ sc:regions }}<option value="{{ id }}">{{ name }} ({{ country:name }})</option>{{ /sc:regions }}{{ sc:regions }}<option value="{{ id }}">{{ name }} ({{ country:name }})</option>{{ /sc:regions }}
When looping through, you may also reference the name & iso of the related country.
You may scope down regions to a specific country if needed:
{{ sc:regions country="GB" }}{{ sc:regions country="GB" }}