latent heat

Diagram shows a process of change of state.
Rajah menunjukkan proses perubahan keadaan jirim.

In which process, A,B,C,D is latent heat of vaporization absorbed?
Antara proses A,B,C,D yang manakah haba pendam pengewapan diserap?

Formula :

Q=ml

factor : mass and heat

the answers : C