*/*_Raw materials for urea production are?

• A. CO‚Äö√á√á and N‚Äö√á√á
• B. CO‚Äö√á√á, H‚Äö√á√á and N‚Äö√á√á
• C. NH‚Äö√á√â and CO
• D. HNO‚Äö√á√â and CaCO‚Äö√á√â