Old age pigment is -
Hemosiderin
Melanin
Lipofuscin
Bilirubin
Ans. is 'c' i.e., Lipofuscin It is an insoluble pigment, also known as lipochrome and wear or tear or aging pigment. Lipofuscin is not injurious to the cell or its functions.Refer to APPENDIX-90 in volume-3 of this book