In a cultural performance, * * * has 10 programs, including 2 dances, 3 songs and 5 others. If the order of their performances is decided by drawing lots.

Two dances are arranged together, and three song programs are arranged separately from each other in the way of A22A66A37.

∴ The probability that two dances are arranged together and three song programs are separated from each other:

p = a 22 a 66 a 37 a 10 10 = 1 12。

Therefore, choose: B.