The suffix that indicates 'pertaining to' is which of the following?

The suffix that indicates 'pertaining to' is indeed -ic. This suffix is commonly used in medical terminology to create adjectives that describe or relate to specific conditions or structures. For instance, in terms like "gastric," which pertains to the stomach, or "cardiac," which refers to the heart, the -ic suffix transforms the root word into an adjective, emphasizing its association with the noun.

In contrast, the suffix -itis refers to inflammation (such as in "appendicitis," which means inflammation of the appendix). The suffix -oma denotes a tumor or mass (as in "carcinoma," which refers to a type of cancer). Meanwhile, -logy refers to the study of a particular subject (for example, "biology" is the study of life). Each of these suffixes serves a distinct function in medical terminology, highlighting why -ic is the correct choice for indicating "pertaining to."