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

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