What does this rebus means ?

PROG WORKRESS

Before reading ahead, you must know the fact that only one of the people here is telling the truth.

A says that B is lying.
B says that C is lying.
C says both A and B are lying.

Can you find out who is speaking the truth?

What is the fastest way to double your money?

I cannot talk, but I always reply when spoken to. What am I?

Find the number of squares in the below-given picture.

A thief is convicted in Mexico. He gets the death penalty. The judge allows him to say the last sentence to determine how the penalty will be carried out. If the thief lies, he will be hanged, if he speaks the truth he will be beheaded. The thief tells the last sentence and to everybody's surprise some minutes later he is set free because the judge cannot determine his penalty. What did the thief say?

A king sentenced a man to the death sentence for some crime he had committed. Known for his kindness, the king told the culprit that he had a choice to die in a way he decides.

The culprit was clever and said something that saved him from death. What method do you think he must have chosen for his death?

Eight of us go fourth, not back, to protect our king from an attack. What are we?

What is the below Rebus indicate?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?