निम्नलिखित में से कौन सा विषाणु मुख्य रूप से दूषित पानी के माध्यम से फैलता है और जल-जनित बीमारी का कारण बनता है?

Which of the following groups consists exclusively of diseases caused by bacterial infections?

Which of the following groups of biological agents are the primary carriers in contaminated water that cause waterborne diseases such as cholera, typhoid fever, and dysentery?

Identify the bacterial disease from the following options: