Consider the gear train shown in the given Fig. 42 and table of gears and their number of teeth.

Gears \(B C\) and \(D E\) are moulded on parallel shaft rotating together.
If the speed of \(A\) is \(975 \mathrm{rpm}\), the speed of \(F\) will be

(a) \(39 \mathrm{rpm}\)

(b) \(52 \mathrm{rpm}\)

(c) \(75 \mathrm{rpm}\)

(d) \(80 \mathrm{rpm}\).

Gear: No. of teeth: + DE+ + B + Fig.42 A 420 B C 50 72 D E F 25 75 26 26 65