Different steps involved in the manufacture of sulphuric acid in contact process are given below. Arrange them in the correct sequence
Formation of oleum
Oxidation of `SO_2` ,
Hydrolysis of oleum
Combustion of sulphur

Options

A. d a c b
B. a d b c
C. d b a c
D. a d c b

Explanation

To arrange the steps involved in the manufacture of sulfuric acid using the contact process in the correct sequence, we can follow these steps:

1. **Combustion of Sulfur**: The process begins with the combustion of sulfur. Sulfur is burned in the presence of oxygen to produce sulfur dioxide (SO₂).

**Chemical Reaction**:
\[ S + O_2 \rightarrow SO_2 \]
...