Vickers indenter has _________ angle between opposite faces of a diamond.

• A. 90¬¨¬®‚Äö√†√ª
• B. 120¬¨¬®‚Äö√†√ª
• C. 136¬¨¬®‚Äö√†√ª
• D. 180¬¨¬®‚Äö√†√ª