Which of the following does not serve the purpose of using patterns in sand casting?

• A. Contain core prints if the casting requires a core and need to be made hollow
• B. To give the exact shape and size (in addition to the allowances) to the casting as that of the final object
• C. Reduces the cost of production while used in mass production
• D. Sometimes used to carry the mechanism to melt the metal/material which is to be poured into the cavity