Mnet’s “Build Up” has unveiled all 40 contestants! Hosted by actress Lee Da Hee, “Build Up” is a new survival program in which 40 contestants—many of whom are members of current boy groups—will compete for the chance to debut in a project vocal boy group. Lee Seok Hoon, Baekho, BTOB’s Eunkwang, MAMAMOO’s Solar, Red Velvet’s Wendy, and Kim Jae Hwan will be