For the question- State any two conditions essential for good health? can the answer be good economic conditions and social equity , harmony? (it is given on pg-177, right hand side , first para)
If we consider the health in terms of the healthy society, then the two conditions can be good economic conditions and social equity , harmony among the people of that society.
If we consider it in terms of health of individual or people, the conditions should be nutritious food and good environmental conditions.