Which of the following diseases is NOT transmitted through contaminated water?
Dengue is a vector-borne disease transmitted by the Aedes mosquito, not through contaminated water. This follows from NCERT principle where relation explains outcome clearly for students.
Ref: NCERT Biology Textbook for Class XI and XII (Zoology section), Chapter: Biology - Zoology portion covering relevant system and function, Topic: Structural organization and physiology.