Which of the following are essential materials for making abrasives?
i. Borax, turpentine
ii. Wax, parazone
iii. Broken china, eggshells
iv. Detergent powder, eggshells

• A.i and ii only
• B.i and iii only
• C.i and iv only
• D.ii and iv only
• E.iii and iv only