**Core Concept**
Linoleic acid is an essential omega-6 fatty acid that plays a crucial role in various bodily functions, including inflammation regulation and cellular membrane structure. It is an important component of unsaturated fats found in various plant-based oils.

**Why the Correct Answer is Right**
Safflower oil is rich in linoleic acid, with a composition of approximately 70-80% linoleic acid. This high concentration makes it an ideal source for individuals requiring a significant intake of omega-6 fatty acids. The high linoleic acid content in safflower oil is due to the presence of the enzyme linoleate desaturase, which facilitates the conversion of linoleic acid into more unsaturated fatty acids.

**Why Each Wrong Option is Incorrect**
**Option A:** Groundnut oil, while a good source of unsaturated fats, contains a relatively lower amount of linoleic acid compared to safflower oil. Its linoleic acid content ranges from 30-50%.
**Option C:** Mustard oil, primarily composed of monounsaturated and saturated fatty acids, has a very low linoleic acid content, making it an unsuitable choice for those seeking a rich source of omega-6 fatty acids.
**Option D:** Coconut oil is predominantly composed of saturated fatty acids and contains minimal amounts of unsaturated fats, including linoleic acid.

**Clinical Pearl / High-Yield Fact**
It is essential to note that excessive consumption of linoleic acid can lead to an imbalance in omega-6 to omega-3 fatty acid ratios, potentially contributing to chronic inflammation and various diseases. Therefore, a balanced intake of these essential fatty acids is crucial for maintaining optimal health.

**Correct Answer:**
✓ Correct Answer: B. Safflower oil