In this task, you're given a question, along with a context passage. The passage will not have a direct answer to the question, but can include some information and a clue for the answer. Assuming you can only obtain information about one entity in the passage, your job is to determine whether information from the passage can be used to answer the question. Indicate your choice as 'a' for Yes or 'b' for No.
Q: Question: Was Suho over 21 when he joined SM Entertainment after a successful audition? Passage:Exo-K's leader, Suho, was the first member to join SM Entertainment, after a successful audition through the company's casting system in 2006. The following year, Kai, with encouragement from his father, auditioned at the SM Youth Best Contest; he won and received a contract. Chanyeol, who took second place in a Smart Model Contest, and Sehun, who went through four auditions in two years, were the next members to become trainees in 2008. In 2010, Exo-K's D.O. sang for his audition and was eventually offered a contract. The last member of Exo-K to become a trainee was Baekhyun, who joined in 2011 through SM Entertainment's casting system and trained for approximately one year before debut. In Exo-M, Kris auditioned in 2008 at a global SM Entertainment audition in Canada, before moving to South Korea for training. That same year, Lay auditioned in Changsha, China, and subsequently moved to South Korea, while Xiumin attended an audition with his friend and won second place. In 2010, Luhan was scouted by an SM Entertainment representative in Seoul and passed his audition, while Tao was scouted at a talent show. The last member to join Exo-M was Chen, who took part in the casting system in 2011. The band's first televised performance was at the annual SBS Gayo Daejeon event on December 29, 2011.

A:
b