SI : My office sent an urgent email asking me to return. S6: It was evening before I could sit and write to my parents that I would be joining them soon. P : I immediately replied requesting a few days of grace as I had to book the return passage, pack and attend sundry matters before winding up my establishment here. Q : On the way, I went to the laundry and made sure I would get my clothes in time. R : Then I rushed to the bank, collected all my money and made reservations for my return journey. S : From the shop next to it, I bought a couple of trunks to dump my books and other odd articles so that I could send them away in advance. The proper sequence should be
- AP Q R S
- BP R Q S
- CP R S Q
- DP S R Q
Explanation
P (the reply requesting a few days' grace) immediately follows S1's urgent email. Then the winding-up sequence runs: R (bank, money, reservations), Q ('on the way' — the laundry), S (the shop next door — the trunks), ending with S6's evening letter to his parents. The order P R Q S (B) is the only coherent chain. Hence the answer is B.