The largest organ in the human body is the skin. While this question presents options that include internal organs, the skin is the largest organ by surface area and weight. However, none of the listed options is correct.
Let's analyze the given options:
Stomach is an important digestive organ, but it is not the largest organ in the body. The stomach is roughly the size of a football.
Lungs are large organs responsible for respiration, but the size of the lungs is still smaller compared to the skin.
Pancreas is a small, elongated organ located behind the stomach that plays a key role in digestion and blood sugar regulation, but it is not the largest.
Heart is a muscular organ responsible for pumping blood, but it is also not the largest organ in the body.
Thus, the correct answer is Skin, although it is not present in the options. The skin is by far the largest organ in terms of surface area and weight.