Find the normal circular pitch as well as the normal module if the larger gear has 40 teeth and the gear ratio is 4. The helix angle is 20° and the shaft angle is 50°. Assume the centre distance between the gears to be 200 mm.

A) 22.12 mm, 7.04 mm B) 21.31 mm, 6.78 mm
C) 20.37 mm, 6.48 mm D) 21.98 mm, 6.996 mm

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