This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
Wear and tear pigment in the body refers to 
Select and explain. 
A. Lipochrome, B. Melanin, C. Anthracotic pigment, D. Haemosiderin
A: Lipochrome
Answer: A: Lipochrome 
Explanation: Lipofuscin, or "wear-and-tear pigment," is an insoluble brownish-yellow granular intracellular material that accumulates in a variety of tissues (paicularly the hea, liver, and brain) as a function of age or atrophy.Lipofuscin represents complexes of lipid and protein that derive from the free radical-catalyzed peroxidation of polyunsaturated lipids of subcellular membranes. It is not injurious to the cell but is a marker of past free radical injury.( Robbins Basic Pathology, 9th edition, page 24 )