Who are the candidates in South Korea's snap presidential election? | AFP

South Korea's liberal frontrunner candidate Lee Jae‑myung will face off with his conservative opponent Kim Moon‑soo in a presidential election triggered by the ousting of ex‑leader Yoon Suk‑Yeol after a disastrous martial law declaration. South Korean voters are turning out in record numbers, with one in five already having cast early ballots ahead of election day on June 3.