Final answer:
The correct option that cannot be found on a triangular architect's scale is 1/4".
Step-by-step explanation:
The correct option would be d) 1/4".
A triangular architect's scale typically contains several scales that allow architects to measure and draw accurately. The commonly used scales include 1/8", 3/32", 3/16", and 1/4". Therefore, the option that cannot be found on a triangular architect's scale is 1/4".