There are four friends: A, B, C and D. They are musicians, scientists, astronomers and logicians. When they were young, they used to predict the future together. At that time, a predicted that I could not become a scientist anyway. B predicted that C would be a logician in the future. C predicted that D would not become a musician. D predicted that B could not become an astronomer. In fact, Only the logician predicted correctly.
The statement "B is a logician, D is an astronomer, A is a scientist, and C is a musician" is correct.