The correct option is (c).
Explanation
The ISI (Indian Standards Institution) mark is a certification mark for industrial products in India. It serves as a guarantee that a product conforms to the specific Indian Standard (IS) developed by the Bureau of Indian Standards (BIS), the national standards body of India.
Statement-wise Analysis
- Statement 1 is Incorrect. The ISI mark is assigned and governed by the Bureau of Indian Standards (BIS), not the World Health Organization (WHO). The WHO is a specialized agency of the United Nations responsible for international public health.
- Statement 2 is Correct. The presence of an ISI mark on a product is an assurance to the consumer that the product conforms to the specifications and quality standards laid down by the BIS. It certifies safety and quality.
- Statement 3 is Correct. While voluntary for many products, the ISI mark is mandatory for certain electrical appliances that pose a safety risk, such as switches, electric irons, heaters, and cables. This ensures that these products meet essential safety requirements to prevent electrical accidents.
Key Takeaway: The ISI mark is issued by the Bureau of Indian Standards (BIS) to certify conformity to quality standards. It is mandatory for high-risk electrical appliances to ensure user safety.