The correct answer is: Hydrogen.
Hydrogen is a colorless, odorless, and tasteless gas that is the most abundant element in the universe. It is used in the manufacture of vanaspati ghee because it is a good reducing agent. This means that it can remove oxygen from other substances, which is necessary in the process of making vanaspati ghee.
Oxygen is a colorless, odorless, and tasteless gas that is essential for life. It is not used in the manufacture of vanaspati ghee because it would react with the hydrogen and produce water.
Carbon dioxide is a colorless,
odorless, and tasteless gas that is produced when organic matter decomposes. It is not used in the manufacture of vanaspati ghee because it would react with the hydrogen and produce carbon monoxide.Nitrogen is a colorless, odorless, and tasteless gas that is the most abundant element in the atmosphere. It is not used in the manufacture of vanaspati ghee because it is not a reducing agent.