Answer:
Option B
Explanation:
when $H_{2}SO_{4}$ (conc.) react with non-metals, it give oxoacid of non-metal and $SO_{2}$ (g) . If oxoacid is unstable , it decomposes.[as in $H_{2}CO_{3}$, which decompose as $CO_{2}+H_{2}O]$ the whole reaction occurs as follows:
$C+H_{2}SO_{4}$ $\underrightarrow{\triangle}$ $ H_{2}CO_{3}+SO_{2} \rightarrow CO_{2}+H_{2}O+SO_{2}$
Hence , option (b) is the correct answer
