JEE Main 2020 Chemistry question

Consider the Assertion and Reason given below. Assertion (A) : Ethane polymerized in the presence of Ziegler Natta catalyst at high temperature and pressure is used to make buckets and dustbins Reason (R) : High density polymers are closely packed and are chemically inert. Choose the correct answer from the following :

• (A)Both (A) and (R) are correct and (R) is the correct explanation of (A)Correct
• (B)Both (A) and (R) are correct but (R) is not the correct explanation of (A)
• (C)(A) is correct but (R) is wrong
• (D)(A) and (R) both are wrong