Consider two shafts connected with two gears as per the following options:1. One on each shaft2. Through an intermediate gear mounted on an intermediate shaft, and every shaft having one gear only3. Through an intermediate gear mounted on an intermediate shaft, with the intermediate shaft having two gears, whereas the other shafts have one gear eachWhich of the above represent(s) a simple gear train?

• A. 1 only
• B. 1 and 2 only
• C. 2 and 3 only
• D. 1, 2 and 3