I was in a limited partnership that filed for bankruptcy. All shares were cancelled with no consideration. Is this a complete dispostion or disposition not via a sale?

The limited partnership filed for Chapter 11 Bankruptcy in 2017. Holders of equity interests are not entitled to any recovery. 

Also regarding my investment in this limited partnership, is all of my investment in this activity at risk? That option seemed to be the most appropriate as the other listed options were not applicable.