Step 1: Concept
Glands are organs that produce and release substances. In the human body, they are categorized based on their size, function, and whether they have ducts.
Step 2: Meaning
The liver is a vital organ located in the upper right quadrant of the abdomen, performing over 500 functions including detoxification and protein synthesis.
Step 3: Analysis
While the pancreas and thyroid are significant glands, they are much smaller in mass. The liver typically weighs between 1.2 to 1.5 kg in an adult, making it both the largest internal organ and the largest gland.
Step 4: Conclusion
Due to its substantial mass and volume compared to other secretory organs, the liver is classified as the largest gland.
Final Answer: (B)