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.