Protein which plays a significant role in ageing is
A. Actin - plays an important role in embryogenesis, the healing of wounds and the invasivity of cancer cells.
B. Myosin – plays an important role in muscle contractions and a variety of movements of nonmuscle cells, including cell division,
C. Collagen – plays a significant role in ageing.
D. Elastin - plays an important role in the biomechanical function of vital body tissues and organs such as the heart, lungs, skin and the vocal folds.
So, the correct option is ‘Collagen’.