Consider the following: Assertion (A) : Alum is applied to stop bleeding from cuts. Reason (R) :Blood is a colloidal system containing colloidal particles. The Aluminium ions of Alum have high coagulating power so the blood gets coagulated. Select the correct answer using the code given below: Codes:

• (a)Both (A) and (R) are true, and (R) is the correct explanation of (A).
• (b)Both (A) and (R) are true, but (R) is not a correct explanation of (A).
• (c)(A) is true, but (R) is false
• (d)(A) is false, but (R) is true