A gear train is made up of five spur gears as shown in the

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A gear train is made up of five spur gears as shown in the figure. Gear 2 is driver and gear 6 is driven member. N₂, N₃, N₄, N₅ and N₇ represent number of teeth on gears 2,3,4,5 and 6 respectively. The gear(s) which act(s) as idler(s) is/are

1. only 3
2. only 4
3. only 5
4. Both 3 and 5

Correct Option: C

ω₂	=	ω₂	ω₃	ω₅	=	N₃	N₅	N₆	=	N₃N₆
ω₆	=	ω₃	ω₅	ω₆	=	N₂	N₄	N₅	=	N₃N₄

only Gear(5) is Idle