This is an example of fat

(a) Groundnut oil

(b) Coconut oil

(c) Vegetable ghee

(d) Glyceryl trioleate

The correct answer is (c) Vegetable ghee.

Here's a breakdown of why:

In chemistry and nutrition, both fats and oils are types of lipids called triglycerides. The main difference between them is their physical state at room temperature:

• Fats are typically solid at room temperature.
• Oils are typically liquid at room temperature.

Analysis of the Options

• (a) Groundnut oil: As the name suggests, this is an oil, meaning it is liquid at room temperature.
• (b) Coconut oil: This is a unique case. It has a high saturated fat content, so it's often solid at cooler room temperatures (below 24°C or 76°F) but melts into a liquid in warmer conditions. While it can be a solid fat, its state is variable.
• (c) Vegetable ghee: Also known as vanaspati, this is produced by hydrogenating vegetable oils. This process specifically converts liquid oils into a solid fat to give it a butter-like consistency. It is always solid at room temperature.
• (d) Glyceryl trioleate: This is the chemical name for a specific triglyceride molecule that is the main component of olive oil. It is a liquid at room temperature.

 Among the given choices, vegetable ghee is the most definitive example of a substance that is consistently a solid fat at room temperature.