IKMC 2027 - Grades 7-8 - Self-study SET 15 - Thematic Batch 3 Question 11

In cube ABCD.MNPQ, which segment is longest?

Original printed choices: A) CD; B) MD; C) BQ; D) ACDP; E)

Editorial task: Compare the well-defined segments and explain the malformed D and blank E choices without silently inventing missing text.