Dharma Wheel

My understanding is that if an Arhat dies they go to parinirvana. However, somewhere I heard a belief that Arhats can choose to leave parinirvana to go on to become a buddha. A third thing I heard was that Arhats eventually have to become buddhas. What are the beliefs here?

thanks
-d

My understanding is that if an Arhat dies they go to parinirvana. However, somewhere I heard a belief that Arhats can choose to leave parinirvana to go on to become a buddha. A third thing I heard was that Arhats eventually have to become buddhas. What are the beliefs here?

thanks
-d