Discussion
Assertion: the projection symbol must appear in the title block. Reason: the same arrangement of views means different things in first and third angle.
Answer: C
Correct answer: both the assertion and the reason are true and the reason explains the assertion
Both are true and the reason is the whole justification. The same three views arranged the same way describe two different, mirror-image objects depending on which system is in use, and nothing in the geometry reveals which was intended. The symbol in the title block is therefore not a formality but the only thing that makes the drawing unambiguous.
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