Statement (A): 1 mole of ${\mathrm{KClO}}_3$ weight in grams 122.5 g

Statement (B): Two moles of  ${\mathrm{KClO}}_3$ weight in grams 245 g

Statement (C): Three moles of ${\mathrm{Co}}_2$ weight in grams 132 g

The given three statements are true as per their gram molecular weight. If 1 mol of ${\mathrm{KClO}}_3=122.5\mathrm{g}$

Then, weight of 2 mol of  ${\mathrm{KClO}}_3=2\times 122.5\mathrm{g}=245 \mathrm{g}$

$1 \mathrm{mole} \mathrm{of} {\mathrm{CO}}_2\to 44$

$3\mathrm{mole}\to ?$

$3\times 44=1\times \mathrm{x} \mathrm{x}=132\mathrm{g}$