The correct option is C Palm: Length of foot
Following are some different ancient units of measurement:
1. Hand Span: Maximum distance between the tips of the thumb and little finger
2. Cubit: Length from the elbow to the fingertips
3. Foot: Length of foot
4. Palm: Length of the palm
5. Yard: Distance between the end of the outstretched arm and chin
So, Option C is wrong as Palm represents the length of palm not foot.