Question

A triangular prism is cut into two parts, P and Q, as shown. Which option represents part P? 

• A. A
• B. B
• C. C
• D. D

Hint:

When matching a cut solid, track two invariants: the identity of unique faces (e.g., triangular top) and the order/orientation of interlocking steps—mirrors won’t mate.

Answer 1

The Correct Option is B

Part P is the upper piece with a triangular top face and a stepped interlocking profile that mates with Q.
Only Option (B) shows: (i) the triangular top face oriented like the given figure, and (ii) the correct sequence and orientation of the step/notch features that complement Q.
The other options either reverse a step, miss the triangular top, or present the complementary shape of Q rather than P.
\[ \boxed{\text{(B)}} \]