Which of the following is not a classification of traps based on their shape?

Which of the following is not a classification of traps based on their shape? Correct Answer W-trap

Traps are classified into three types based on their shape. These are P-traps, Q-traps and S-traps. Q-traps are also known as half-S-traps. P-trap resembles the shape of letter P, Q-trap resembles the shape of letter Q and S-trap resembles the shape of letter S.
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