Which gauges are present in the first series (degree) of angle gauges?
(a) 5°, 10°, 15°, 25° and 40°
(b) 1°, 3°, 9°, 27° and 41°
(c) 1°, 5°, 9°, 25° and 45°
(d) 5°, 10°, 15°, 30° and 45°
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