पेयजल में अत्यधिक फ्लोराइड प्रदूषण मुख्य रूप से मानव शरीर के किस अंग को प्रभावित करता 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: