Which statement best describes the 3 anatomic variances listed for the equine pelvis?

Which statement best describes the 3 anatomic variances listed for the equine pelvis?

• A. Shorter last lumbar; SP angle cranially; NO supraspinous ligament L5–L6
• B. Shorter last lumbar; SP of coccyx angle caudally; No supraspinous ligament L5–L6
• C. SP angle cranially; SP of coccyx angle caudally; No supraspinous ligament L5–L6
• D. Shorter last lumbar; SP of lumbar angle cranially; No supraspinous ligament L5–L6

Answer: (B)

The question tests recognizing three specific anatomical variations that can occur in the equine pelvis and how their spinous processes orient, plus ligament presence. The correct description combines all three: the last lumbar vertebra is shorter, the spinous process of the coccyx angles caudally, and the supraspinous ligament between L5 and L6 is absent. This exact combination uniquely matches the three variances described. Other options mix the orientation of spinous processes to cranial directions or apply the cranial angle to the lumbar region instead of the coccyx, and some suggest the presence of the ligament between L5–L6. Those discrepancies mean they don’t capture all three variances together, so they aren’t the best fit.

The question tests recognizing three specific anatomical variations that can occur in the equine pelvis and how their spinous processes orient, plus ligament presence. The correct description combines all three: the last lumbar vertebra is shorter, the spinous process of the coccyx angles caudally, and the supraspinous ligament between L5 and L6 is absent. This exact combination uniquely matches the three variances described.

Other options mix the orientation of spinous processes to cranial directions or apply the cranial angle to the lumbar region instead of the coccyx, and some suggest the presence of the ligament between L5–L6. Those discrepancies mean they don’t capture all three variances together, so they aren’t the best fit.