Sahil took a white solid from his teacher to find out its melting point. During the experiment, he found that the melting point was \[\text{160 }\!\!{}^\circ\!\!\text{ C}\]. But, the teacher told him that actual melting point of the solid is \[\text{150 }\!\!{}^\circ\!\!\text{ C}\]. What could be the reason for Sahil's observation?

• A. Melting point of a solid depends upon the procedure and the amount taken.
• B. Solids can have different melting points depending upon the method of storage.
• C. The solid contains some impurities mixed with the pure compound.
• D. If solid is heated strongly, the melting point increases.