Question

Which of the following is an acceptable sequence of experiments, from first to
last?

• A. \( \text{M, P, R, T, S} \)
• B. \( \text{M, P, S, R, T} \)
• C. \( \text{M, S, P, T, R} \)
• D. \( \text{P, M, T, R, S} \)
• E. \( \text{S, M, T, P, R} \)

Hint:

Verify all constraints in sequence.

Answer 1

The Correct Option is B

Step 1: Constraints: T not 4th unless S 2nd, M 1st needs S or R 5th, R 5th bans P 3rd,
P before T.
Step 2: Check each: (A) MPRT: T 4th, S not 2nd (invalid).
Step 3: (B) MPSRT: M 1st, S 5th (valid), P 2nd before T 5th, R 4th, T not 4th (valid).
Step 4: (C-E) fail: C (MSPTR) T 4th no S 2nd, D (PMTRS) P 1st T 3rd violates P before T,
E (SMTPR) T 3rd P 4th violates P before T.