Consonants are formed when airflow is restricted or obstructed, which is called constriction, making them distinct from vowels.
Consonant sounds are produced when the airflow is constricted or obstructed in the vocal tract. This constriction can occur in various places, such as the mouth, throat, or nose, to produce different consonant sounds.
Given the following phonological rule, which one of the options CANNOT be an output?