The one which is not related to others
1-collagen
2-cuticle
3-heamoglobin
4-silk
Kindly give explanation also
Expert's answer
Cuticle is not related to collagen, haemoglobin and silk. Cuticle is not a protein while collagen, silk and haemoglobin are proteins. Cuticle is a layer protects nails from bacteria infections.