In the following reaction,assign the correct category for the underlined atom based on the product of complete hydrolysis at $R.T.$:
$\underline{C}O_2 + H_2O \longrightarrow H_2CO_3$

• A
  If product is oxy acid with $-ic$ suffix
• B
  If product is oxy acid with $-ous$ suffix
• C
  If product are two oxy acids,one with $-ic$ suffix and the other with $-ous$ suffix
• D
  If product is not an oxy acid,neither with $-ic$ suffix nor with $-ous$ suffix