Explanation

(b)
OF_{2} dissolves in water but does not give any oxyacid solution, while SO_{2}, SCl_{4}and SO_{3} give oxyacid solution in water.
SO_{2} + H_{2}O ⟶ H_{2}SO_{3}
_{Sulphurous acid}
SCl_{4} + 3H_{2}O ⟶ H_{2}SO_{3} + 4HCl
_{Sulphurous acid}
SO_{3} + H_{2}O ⟶ H_{2}SO_{4}
_{Sulphuric acid}