Assertion (A): Keratin sulphate consists of acetyl glucosamine, galactose and sulphuric acid.
Reason (R): Keratin provides strength and flexibility to skin and cornea.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.