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.