Step 1: Understanding the Concept:
The regulation of manufacture, import, sale, and distribution of insecticides in India is governed by national legal acts and their associated statutory rules.
Step 2: Detailed Explanation:
- The Insecticides Act was enacted by the Parliament of India on September 2, 1968 (represented by option B).
- The statutory rules designed to implement this act, known as the Insecticides Rules, were framed and officially brought into force across the country on October 30, 1971.
This date marks the formal operationalization of insecticide registration and quality control boards in India.
Step 3: Final Answer:
The Insecticides Rules were brought into force on October 30, 1971, which corresponds to option (A).