History · Technology in Mughal India

Consider the following statements regarding technological advancements and mechanical limitations during the Mughal period: I. The technological framework incorporated the spinning wheel, and gearing mechanisms were used in sugar rolling mills and water lifting. II. The Bengal shipbuilding industry was prominent, but European stepped deck design was not traditional to Bengal. III. The absence of cast iron technology directly contributed to limitations in manufacturing metallic gearwheels and cast iron cannons, necessitating forged/welded iron bars. IV. The Persian wheel was widely used for irrigation, but it was constructed with wooden frames, pinions, and earthen pots rather than fully metallic gearing. Which of the statements given above are correct?