Explanation:

About Patents and Intellectual Property

• A patent is a type of intellectual property right. It is an exclusive right granted by a government to an inventor for a limited, pre-specified time.
• It provides an enforceable legal right to prevent others from copying the invention.

Types of Patents:

• Product Patent: No person can manufacture the patented product without the consent of the patent holder even if he/she uses an alternative process.
• Process Patent: Under this only the process is protected. A person can manufacture the patented product using an alternate process.

Type of regime in India

• India moved from product patenting to process patenting in the 1970s. This enabled it to become a significant producer of generic drugs at global scale.

Hence option 4th is correct.