Under the rules for Short Rest you are able to heal:
A character can spend one or more Hit Dice at the end of a short rest, up to the characters maximum number of Hit Dice, which is equal to the character's level. For each Hit Die spent in this way, the player rolls the die and adds the characters Constitution modifier to it. The character regains hit points equal to the total.
I have a multiclass character - level 1 Monk (d8 Hit Die), levels 2 - 4 Wizard (d6 Hit Die). What Hit Dice would I roll for healing?
- Up to 4d8
- Up to 4d6
- Up to 1d8 and up to 3d6
- Any combination of d8's and d6's up to a maximum of 4 dice