When Jesus asked whose image was on the denarius, what did they answer?

Answer: Caesar's

They answered "Caesar's," and Jesus said, "Give to Caesar what is Caesar's, and to God what is God's."

“But Jesus saw through their hypocrisy and said, “Why are you testing Me? Bring Me a denarius to inspect.” So they brought it, and He asked them, “Whose image is this? And whose inscription?” “Caesar’s,” they answered. Then Jesus told them, “Give to Caesar what is Caesar’s, and to God what is God’s.” And they marveled at Him.”— Mark 12:15-17 (BSB)