Exactly six RAB officers - S, T, U, X, Y, and Z- take turns watching a suspect. To minimize the chance that the suspect will observe them or will escape their surveillance, the officers will operate according to the following conditions:There must be exactly two officers watching the suspect at all times.Whenever the suspect travels by car, either U or X must be one of the two officers watching, but U and X cannot take a turn together.Whenever the suspect travels by train, either Tor Z must be one of the two officers watching, but T and Z cannot take a turn together.If Z is one of the officers watching the suspect, S must be the other officer watching the suspect. S and X cannot take a turn together watching the suspect.If the suspect is traveling by car, which of the following is a pair of officers who could be watching?

Question

Accepted Answer

ঙ. U and Y

ব্যাখ্যা: গাড়িতে U বা X এর ঠিক একজন থাকতে হবে। জোড়া ক (S, T): U/X নেই। খ (S, X): S ও X একসাথে নিষিদ্ধ। গ (T, Y): U/X নেই। ঘ (U, X): দুজনই একসাথে নিষিদ্ধ। ঙ (U, Y): U আছে, X নেই, কোনো নিষিদ্ধ শর্ত ভাঙে না। তাই উত্তর ঙ।

**শর্টকাট:** 'car' হলে অপশনে U বা X ঠিক একটি আছে কি তা আগে দেখো।

**একই ধরনের প্রশ্ন:**
১. ট্রেনে হলে কোন জোড়া সম্ভব? (T,Y / U,Y)
*উত্তর:* T, Y

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