Which of the following statements is`//`are correct about the following reactions? I. `C_(6)H_(12)O_(6)overset(H_(2)SO_(4)(conc))rarr6C+6H_(2)O` II. `

Which of the following statements is`//`are correct about the following reactions?
I. `C_(6)H_(12)O_(6)overset(H_(2)SO_(4)(conc))rarr6C+6H_(2)O`
II. `H_(2)SO(dil)+ZnCO_(3)rarrZn^(2+)+CO_(2)+SO_(4)^(2-)+H_(2)O`
III. `H_(2)SO_(4)(dil)+ZnrarrZn^(2+)+H_(2)+SO_(4)^(2-)`
IV. `5H_(2)SO_(4)(conc)+4ZnrarrH_(2)S+4Zn^(2+)+4SO_(4)^(2-)+4H_(2)O`
A. In reaction (I), `H_(2)SO_(4)` acts as a dehydrating agent.
B. In reaction (II), `H_(2)SO_(4)` acts as an acid.
C. In reaction (III), `H_(2)SO_(4)` acts both as an acid and an oxidising agent.
D. In reaction (IV), `H_(2)SO_(4)`, acts as an oxidising agent.