Answer the question on basis of passage given below :
Molecular nitrogen is very little reactive chemically. During lightning discharge, atmospheric nitrogen and oxygen combines to form nitric oxide which also combines with oxygen to form nitrogen dioxide. Both NO and \(NO _2\) constitute smog which is very poisonous. It can cause burning sensation in the eyes and adversely affect respiratory system.
What is the value associated with control of photo chemical smog?

1. A Control of photochemical smog can provide relief from diseases linked with respiratory system such as cough, cold, bronchitis asthma.
2. B Control of photochemical smog can provide relief from diseases linked with digestive system such as stomach pain.
3. C Control of photochemical smog can provide relief from diseases linked with nervous system such as headache, brain problem.
4. D Control of photochemical smog can provide relief from diseases linked with circulatory system such as Anemia.