Which of the following statements about the process of melting of a solid are true? The temperature of the solid will?

I. remain steady until melting starts.

ll. keep rising until melting starts,

Ill remain steady as melting proceeds.

V, keep rising as melting proceeds.

A. II and llI only
B. IlI and IV only
C. I, Il and Ill only
D. ll and IV only

Correct Answer:

Option B = IlI and IV only