Concept: The Water (Prevention and Control of Pollution) Act is an important environmental law in India. It was enacted to prevent and control water pollution and to maintain or restore the wholesomeness of water.
Step 1: Understand the purpose of the Act.
The Act provides legal provisions for controlling pollution of rivers, lakes, streams, and other water bodies.
\[
\text{Water Act} \Rightarrow \text{Prevention and control of water pollution}
\]
Step 2: Recall the year of enactment.
The Water (Prevention and Control of Pollution) Act was passed in the year 1974.
\[
\text{Water Act} = 1974
\]
Step 3: Choose the correct option.
Among the given options, 1974 is option (C).
Therefore, the correct answer is 1974.