Which letter-sound correspondence unique to Greek is correctly identified below?

The identification of ph as /f/, ch as /k/, and y as /i/ reflects specific letter-sound correspondences found in Greek phonetics that have influenced English and other languages. This understanding focuses on how certain combinations in Greek produce distinct sounds not typically aligned with their representations in English. For example, the Greek letter "phi" is pronounced as /f/, while "chi" corresponds to /k/, and the letter "upsilon" is often represented by "y" in English, producing the sound /i/. These correspondences illustrate the unique phonetic rules that stem from the Greek language and have implications for the study of linguistics and phonology.

Other choices either mention combinations that do not originate primarily from Greek or represent sounds that relate differently to the Greek alphabet, making them less relevant in the context of Greek letter-sound correspondences.