Four (A, B, C and D) suspects were

Four (A, B, C and D) suspects were interrogated:
A said: C won't cheat unless B cheated.
B said: Either A or B cheated.
C said: B didn't cheat, I cheated.
D said: B cheated.
Only one person is lying, which of the following is correct:

ผลลัพธ์ (ลาว) 1:

ສີ່ (A​, B​, C ແລະ D​) ຜູ້​ຕ້ອງ​ສົງ​ໄສ​ໄດ້​ຖືກ​ສອບ​ປາກ​ຄໍາ​:
ກ່າວ​ວ່າ​:​. C ຈະ​ບໍ່​ໄດ້ cheat ເວັ້ນ​ເສຍ​ແຕ່​ວ່າ B ໂກງ
B ກ່າວ​ວ່າ​: ບໍ່​ວ່າ​ຈະ​ເປັນ​ຫຼື B cheated​.
C ໄດ້​ກ່າວ​ວ່າ​:​. B ບໍ່​ໄດ້​ໂກງ​, ຂ້າ​ພະ​ເຈົ້າ cheated
D ໄດ້​ກ່າວ​ວ່າ​: . cheated B
ມີ​ພຽງ​ແຕ່​ຫນຶ່ງ​ບຸກ​ຄົນ​ທີ່​ນອນ​ຢູ່​, ຊຶ່ງ​ຕໍ່​ໄປ​ນີ້​ເປັນ​ທີ່​ຖືກ​ຕ້ອງ​: