(LEAD) (Olympics) S. Korea's Choi Min-jeong loses 500m silver on penalty
(ATTN: ADDS more details, comments from 5th para, photo)By Kim Boram and Kang Yoon-seung
GANGNEUNG, South Korea, Feb. 13 (Yonhap) -- South Korea's teenager Choi Min-jeong lost the silver medal in the women's 500 meter short track speed skating event