Question

Which of the following experiments can be done fourth and fifth, respectively, in
the sequence of experiments?

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

Hint:

Check T 4th condition and P before T.

Answer 1

The Correct Option is C

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: 4th and 5th pair: T 4th needs S 2nd, but 1st-3rd must fit.
Step 3: (C) P 4th, T 5th: P before T holds, e.g., SMRPT (S 2nd, T 4th valid).
Step 4: Others fail: (A) M 4th, P 5th conflicts M 1st rule, (B) P 4th T before P invalid,
(D) T 4th needs S 2nd not 5th, (E) T 4th needs S 2nd not P 5th.