A mixture of NaHCO₃ and Na₂CO₃ weighs 950 g. When the mixture is heated strongly in an open vessel until constant weight, the mass of the sample reduces by 155 g. The correct information(s) is/are:
a) Only NaHCO₃ decomposes
b) Only Na₂CO₃ decomposes
c) Both NaHCO₃ and Na₂CO₃ decompose
d) Neither NaHCO₃ nor Na₂CO₃ decompose