
Passage: A unit arranges 6 people on duty on The first day, the second day, the third day of the new year. They are G., H, K, L, P, and S. Two people are required to be on duty every day. The personnel arrangement must meet the following conditions: (1) L and P must be on duty on the same day. (2) G and H cannot be on duty on the same day. (3) If K is on duty in the first day, then G is on duty in the second day. (4) ) If S is on duty in the third day, then H is on duty in the second day.
Question: If H is on duty on the same day as the day before S, which of the followings must be true?
A. A.G is on duty in the second day
B. B.P is on duty in the second day
C. C.K is on duty in the first day
D. D.H is on duty in the first day
Answer: