JEE Main 2021 Chemistry question

Assertion A : Lithium halides are some what covalent in nature. Reason R : Lithium possess high polarisation capability. In the light of the above statements, choose the most appropriate answer from the options below:

• (A)A is true but R is false
• (B)A is false but R is true
• (C)Both A and R are true but R is NOT the correct explanation of A
• (D)Both A and R are true and R is the correct explanation of ACorrect