Six subjects S1, S2, S3, S4, S5, S6 (not necessarily in the same order), are to be taught from Monday to Saturday. One subject will be taught one day. Only S5 is taught before S1. S2 is taught before S4. S2 will not be taught on Wednesday. No other subject is taught after S6. Based on the above, arrange the following subjects in proper sequence.
(A) S6
(B) S4
(C) S3
(D) S1
Choose the correct sequence from the options given below:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → (D), (C), (B), (A)
The clues with a fixed place are used first, then the remaining days are filled:
Only S5 is taught before S1, so S5 is on Monday and S1 on Tuesday
No subject is taught after S6, so S6 is on Saturday
S2, S3 and S4 take Wednesday to Friday:
S2 is not on Wednesday and comes before S4, so S2 is on Thursday and S4 on Friday
S3 takes the day left, Wednesday
In order of the days the four subjects come as S1, S3, S4, S6, that is, (D), (C), (B), (A).