Complete the text with suitable preposition :

Many people do not get enough nutrition (a) _____ what they eat. Many children become blind because they do not get necessary nutrition. Diarrhoea is a common disease. This is because many do not drink clean water or they eat dirty food. So, they often suffer (b) ____ diarrhoea. The condition (c) ____ our villages is very serious. The best way to keep in good health is to follow the rules (d) ____ cleanliness. A large number (e) ____ people do not follow the rules (f) _____ health. It is a great problem (g) ____ our country. So, (h) ____ order to keep in sound health, all the people must be strict (i) ____ the rules (j) _____ health.