In the context of an "asado," which is a traditional Argentine barbecue, the cuts of meat typically used differ from those commonly found in a standard barbecue, especially in regions like the United States. Among the options provided, the cut of meat that is most commonly associated with an asado but not as typical at a barbecue would be:
C. ribs
In an Argentine asado, "asado de tira" refers specifically to short ribs, which are a traditional feature. While BBQs can also have ribs, the preparation and cuts may differ significantly in style and method. The other cuts listed (chuck, sirloin, and blade steak) are also used in barbecues but may not have the same relevance or preparation style as seen in asado.