(A) 1 BTU =453.6 calories
(B) 1 BTU = 252 calories
(C) 1 calorie = 252 BTU
(D) 1 calorie = 453.6 BTU
(A) 1 BTU =453.6 calories
(B) 1 BTU = 252 calories
(C) 1 calorie = 252 BTU
(D) 1 calorie = 453.6 BTU
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