101. The mollusc dredger to which you are assigned is fitted with reduction gears as shown in the illustration. What statement is true concerning this type of reduction gear

Answer B is correct. The gear box has one engine input shaft and a single stage of speed reduction, classifying it as a single-input, single-reduction gear. A single-input gear has one driving shaft, while a single-reduction gear has one stage of gear meshing. The illustration shows only one input shaft and one reduction stage, eliminating the other answer choices.