Final answer:
The description of two alternating oblongs connected by a ridge with one oblong being molded and one set does not correspond to a definitive term among the provided options. This could refer to a particular design or architectural element, and further context from class materials is needed to determine the correct answer.
Step-by-step explanation:
The term for two alternating oblongs connected by a ridge where one oblong is molded and one oblong is set is not explicitly defined by the options provided (Ridge oblong, Molded oblong, Set oblong, Alternating oblong). This question seems to describe a specific kind of artistic or architectural detail, possibly in reference to sculpture or design elements. However, without more context or a standard definition, it's difficult to pinpoint an exact term for this description. If this is a term from a specific textbook or class material, it would be best to refer to those resources directly for the correct terminology.