This is the 836th most frequent Bulgarian word.
кои
"Кои" means "which ones" or "who" (plural) in English.
In this sentence, 'кои' is used as an interrogative pronoun to ask about specific people or subjects.
Кои ученици ще участват в състезанието?
Which students will participate in the competition?
Here, 'кои' acts as a relative pronoun introducing a clause specifying the selected items.
Те избраха кои картини да бъдат изложени.
They chose which paintings to be exhibited.
In this example, 'кои' is being used to specify a subset of items within the context of a decision-making process.