Select the option that is the correct direct speech of the given sentence.
The teacher instructed the class leader to tell the students that they should not use red pens.
1
The teacher instructed, "Class Leader, tell the students that they could not use red pens."
2
The teacher said, "Class Leader, tell the students that they cannot use red pens."
3
The teacher said, "You should not use red pens."
4
The teacher said, "Class Leader, tell the students that they shall not use red pens."