Calorie is defined as the amount of heat required to raise temperature of 1 g of water by `1^@C` and it is defined under which of the following conditions?
A. `13.5^(@)C to 14.5^(@)C at 76 mm of Hg`
B. `14.5^(@)C to 15.5^(@)C at 760 mm of Hg`
C. `6.5^(@)C at 75^(@)C at 76 mm of Hg`
D. `98.5^(@)C to 99.5^(@)C at 760 mm of Hg`