The correct option is C Volume - Gallon, Quart, Pint
Option A: Weight - Ton, Ounce, Pounds
Units of weight are tons, pounds, ounces etc.
Hence, it is correct.
Option B: Length - Yard, Inch, Foot
Units of length are inch, feet, yard, miles etc.
Hence, it is correct.
Option C: Volume - Gallon, Quart, Pint
Units of Volume are litre, pints, fluid ounces, gallon, cups etc.
Hence, it is correct.
Option D: Length - Yard, Inch, Cup
Cup is used to measure volume not length.
Hence, it is incorrect.