At what temperature, does quartz melt completely?

• A. 1725¬¨¬®‚Äö√†√ªC
• B. 1925¬¨¬®‚Äö√†√ªC
• C. 1825¬¨¬®‚Äö√†√ªC
• D. 2025¬¨¬®‚Äö√†√ªC