If `1.4g` of calcium oxide is formed by the complete decomposition of calcium carbonate, then the amount of calcium carbonate taken and the amount of carbon dioxide formed will be respectively :
A. `2.2g` and `1.1 g`
B. `1.1` g and `2.5 g`
C. `2.5 g` and `1.1 g`
D. `5.0 g` and `1.1 g`
