The correct option is D All of the above
Tetanus is caused by Clostridium tetani which are found in soil, dust, sewage and animal faeces. Hepatitis is caused by three viruses hepatitis A, B and C. These viruses are prevalent in human faeces and contaminated water. Dysentery is caused by an amoeba entamoeba histolytica. It is found in contaminated food and water. So, the correct answer is option D.