Which one of the following is the most important source of water pollution?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Sewage disposal
Note: The pollution table puts sewage disposal in the air row as well as in the water row. Match each source with the row the question asks about.
NCERT (2026-27):
Table 9.1 : Types and Sources of Pollution |
