This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gram-Positive Infections - Corynebacterial Infections, Subject name: Anatomy
Articulation of pisiform bone is with: 
Select and explain. 
A. Triquetral, B. Lunate, C. Scaphoid, D. Trapezoid
A: Triquetral
Answer: A: Triquetral 
Explanation: Ans. A TriquetralRef: BDC, 6th ed. vol. I pg. 25; Snell's 8th ed. pg. 402PISIFORM* It is a sesamoid bone in the tendon of flexor carpi uinaris.* Its dorsal surface presents a smooth, oval facet, for articulation with the triquetral* The palmar surface is rounded and rough, and gives attachment to the transverse carpal ligament, and to the Flexor carpi uinaris and Abductor digiti quinti.