What is the melting point of Silica, for granular refractories?

• A. 3453¬¨¬®‚Äö√†√ªF
• B. 3206¬¨¬®‚Äö√†√ªF
• C. 3119¬¨¬®‚Äö√†√ªF
• D. 3467¬¨¬®‚Äö√†√ªF