Following form(s) of oxygen is/are involved in ozone-oxygen cycle

The correct option is All of the above.

The ozone-oxygen cycle (also known as the Chapman cycle) is a continuous process by which ozone is continually regenerated and destroyed in the Earth's stratosphere. This cycle involves three distinct forms of oxygen: diatomic oxygen, atomic oxygen, and triatomic oxygen (ozone).

Let us break down the cycle step-by-step to see how each form is involved:
1. Production of atomic oxygen and ozone: The cycle begins when diatomic oxygen molecules ($O_2$) absorb high-energy ultraviolet radiation (UV-C) from the sun and photolyze (split) into two individual, highly reactive oxygen atoms (atomic oxygen, $O$):
$O_2+\; UV\; light\; \Rightarrow \; O\; +\; O$
2. Formation of ozone (triatomic oxygen): Each of these free atomic oxygen ($O$) radicals quickly binds with another diatomic oxygen ($O_2$) molecule in the presence of a third collision partner (like nitrogen or oxygen, represented by $M$) to create ozone (triatomic oxygen, $O_3$):
$O+O_2+\; M\; \Rightarrow O_3+\; M$
3. Ozone destruction (photolysis): The newly formed ozone ($O_3$) absorbs medium-energy ultraviolet radiation (UV-B), splitting back into diatomic oxygen ($O_2$) and atomic oxygen ($O$):
$O_3+\; UV\; light\; \Rightarrow O_2+\; O$
4. Recombination: Additionally, an ozone molecule can react with a free oxygen atom to reform two diatomic oxygen molecules:
$O_3+\; O\; \Rightarrow \; 2O_2$

Since the cycle actively utilizes and interconverts atomic oxygen ($O$), diatomic oxygen ($O_2$), and triatomic oxygen ($O_3$), all three forms of oxygen are involved in the ozone-oxygen cycle.