Answer : Option B) The oxygen in the air forms ozone in presence of UV rays
Explanation : The other given options for the chemical change seems to be irrelevant as the option A which converts water into different forms can be called as physical change, option C only dust and soot particle are released in air where no new substance is formed And in option D sulfur dioxide is getting released into air which is also a form of a physical process.
So in option B we can see a new compound getting formed which is ozone in presence of UV rays hence it is a chemical change.