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Assume A is correct, den B is oso correct, therefore not the rite answertvb now,tvbnow,bttvb6 f' M7 R  [7 l0 p* x  E" z" u
Assume B is correct, den assume A is lying, den the culprit is either A or D, den if D is oso lying, den the culprit is either C or D, den C cannot b lying...becuz if A is lying means tat C is correct...5.39.217.77/ P# ]- V: v* T
Assume C is correct, den A is lying, so the culprit is either A, B or D, if B is lying, means tat the culprit is himself, den if D is lying oso den the answer is B, C or DTVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。8 |: u/ c2 c1 K$ o
Assume D is correct, den the culprit is A but den in that case B n C r oso correct...& U6 `) s0 N% T' d2 A

7 ]1 x) }6 U0 q5.39.217.77So the ACTUAL CULPRIT is B
! @) E/ i5 V$ _# S8 Y1 U' @tvb now,tvbnow,bttvb1 e5 L& R& w; c