In sand moulding, the bottom-most part of the flask is called
Cope
Cheek
Drag
Flask bottom
Drag
In most of the sand moulding process, there are mainly two parts of the mould, the upper part is called copeand the bottom part is drag. In some cases, there may be an intermediate part called cheek may also be used between cope and drag.
Hence, the correct option is (C).
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