Concept:
Thiosulfuric acid is obtained from sulfuric acid by replacing one oxygen atom with sulfur.
Its structure contains central sulfur attached to oxygen atoms in different bonding ways.
Step 1: Recall the structure of thiosulfuric acid.
The structure of thiosulfuric acid contains:
• one \(\text{S}=\text{O}\) double bond
• two \(\text{S}-\text{O}\) single bonds
Step 2: Match with the options.
Thus, sulphur forms:
\[
\text{one double bond and two single bonds with oxygen}
\]
Hence, the correct answer is:
\[
\boxed{(A)\ \text{One double bond and two single bond}}
\]