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 1.1g
(b) 1.1g and 2.5g
(c) 2.5g and 1.1g
(d) 5.0g and 1.1g