To solve this, let's examine what is patentable under Indian law:
1. Step 1: What is Patentable in India?
Indian patent law allows the patenting of inventions that are novel, non-obvious, and industrially applicable. However, there are exceptions, and certain categories are not patentable.
2. Step 2: Analyzing the Options.
Process of making a new drug can be patented if it is an innovative method that meets the patent criteria.
New machine can be patented if it is a new invention with industrial applicability.
Genetically modified microorganisms can be patented if they have specific utility and innovation.
3. Step 3: Correct Answer Explanation.
The discovery of a new planet is not patentable because patents are granted only for inventions, not discoveries. A planet is a natural body and cannot be patented.