Find the correct 'indirect speech' for the given sentence in 'direct speech' from the given alternatives.
"The function began at six o'clock," he said.
1
He said that the function had begun at six o'clock.
2
He said that the function have begun at six o'clock.
3
He said that the function had begin at six o'clock.
4
He said that the function has begun at six o'clock.