AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
Answer: B — Packaged drinking water and LPG cylinders
For products affecting health and safety or of mass consumption (e.g., LPG cylinders, packaged drinking water, cement, food colours), ISI/similar certification is mandatory for producers.
The textbook explicitly states that while quality certification is not compulsory for all producers, it is mandatory for products that affect consumer health and safety or are of mass consumption — specifically listing LPG cylinders and packaged drinking water. Options A, C, and D are not mentioned as mandatory categories. This is a direct recall question; quoting the exact examples from the passage scores full marks.
Source: Consumer Rights, Chapter 5 — ISI and Agmark section