Pick out the wrong unit conversion of calorific value.

• 1 kcal/kg = 1.8 BTU/lb = 4.186 kJ/kg.
• 1 BTU/ft3 = 8.9 kcal/m3 = 0.038 MJ/m3.
• 1 BTU/lb = 2.3 kcal/kg.
• 1 kcal/m3 = 0.1124 BTU/ft3.