Q. Which of the following industries require a license under compulsory licensing?

1. Electronic aerospace and defence equipment
2. Specified hazardous chemicals
3. Industrial explosives
4. Cigars and cigarettes of tobacco and manufactured tobacco substitutes

Select the correct option using the codes given below:
Answer: 1, 2, 3 and 4
Notes: The industries under compulsory licensing as per Government of India regulations include: 1) Electronic aerospace and defence equipment, 2) Specified hazardous chemicals, 3) Industrial explosives, and 4) Cigars and cigarettes of tobacco and manufactured tobacco substitutes. These categories are notified due to safety, security, and public health concerns.