Answer:
C) to anger the headmaster
Step-by-step explanation:
In "Like The Sun" by R. K Narayan, the protagonist Sekhar believes that truth is like the sun because as no one can look directly at the sun, he believes that honesty is like that.
He makes up his mind to be totally honest, no matter the outcome, for one day. He decides to be absolutely honest with the headmaster that he cannot in fact, sing.
He expects the headmaster to be angry with his admission but instead, the headmaster is pleased with Sekhar's honesty.