If Y is one of the officers watching the suspect, which of the following cannot be the other officer watching the suspect?
A. S
B. T
C. U
D. X
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Explanation: এই puzzle টির condition গুলো হল: Exactly 2টি officer কে suspect watch করতে হবে। Suspect যদি car এ travel করে, U অথবা X কে watch করতে হবে, কিন্তু 2- জনই একসাথে watch করতে পারবেনা। Suspect যদি train এ travel করে, T অথবা Z কে watch করতে হবে, কিন্তু 2- জনই একসাথে watch করতে পারবেনা। Z থাকলে S কেও থাকতে হবে। S এবং X একসাথে watch করতে পারবেন। Condition 4 থে??ে আমরা জানি, Z suspect-কে watch করলে S কেও করতে হবে। Therefore, Z এর partner কখনোই Y হতে পারবেনা।
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