The statement that is not true about a soccer throw-in is: 4. the ball can be thrown in bounds with sidepin.
In soccer, a player must use both hands to throw the ball from behind their head, and the ball must leave the player's hands while it is completely behind their head. Furthermore, both feet must be in contact with the ground (although one foot can lift off as long as the other stays down). The throw must also be done with both hands coming forward, not as a sidepin throw.