In the stratosphere ozone molecules are absorbing the uvlight. The Oxygen molecules present in the stratosphere will dissociatedto two O atoms by absorbing uv light photon O2 + hv ----> O + O These atomic oxygen then combines with O2to form O3. This ozone molecules absorb UV light between 300 - 200nm Now this ozone splits into O2 and anoxygen atom. O3 + hv ---> O2 + O The formed oxygen atom then reacts with an oxygen molecule toregenerate ozone. O2 + O ---> O3 which is a continous process So the answer is B (O3 ) Solution In the stratosphere ozone molecules are absorbing the uvlight. The Oxygen molecules present in the stratosphere will dissociatedto two O atoms by absorbing uv light photon O2 + hv ----> O + O These atomic oxygen then combines with O2to form O3. This ozone molecules absorb UV light between 300 - 200nm Now this ozone splits into O2 and anoxygen atom. O3 + hv ---> O2 + O The formed oxygen atom then reacts with an oxygen molecule toregenerate ozone. O2 + O ---> O3 which is a continous process So the answer is B (O3 ).