要查询st_info表中姓"王"且单名的学生情况，可用（）命令。

A. SELECT * FROM st_info WHERE st_name LIKE ´王%´
B. SELECT * FROM st_info WHERE st_name LIKE ´王_´
C. SELECT * FROM st_info WHERE st_name=´王%´
D. SELECT * FROM st_info WHERE st_name=´王__´