Question

A solid object with triangular groove is shown on the left. Which option(s) along with this object can form the combination shown on the right?

• A. Fig A
• B. Fig B
• C. Fig C
• D. Fig D

Hint:

When an inclined cut intersects a regular orthogonal block at an angle, it creates wedge-shaped pockets. Conversely, filling that wedge pocket to restore orthogonal steps always requires a standard rectangular block.

Answer 1

The Correct Option is B

Step 1: Match the groove.
The added block must fill the triangular groove exactly with no gap or overlap.
Step 2: Verify the level step.
Only one block completes the shown combination flush; that is the answer.
\[ \boxed{\text{Option 2 (Fig B)}} \]