Which one of the following sensors uses light?

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#Question id: 23384

#Aptitude

OT E, P U F, QV G, RW H, .....

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#Question id: 23385

#Aptitude

1725, 15X4, 3V 3,?, 9R1

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#Question id: 23386

#Aptitude

BXJ, ET L, HP N, KLP, .....

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#Question id: 23387

#Aptitude

P 3C, R5F, T 8I, V12L, …

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#Question id: 23388

#Aptitude

B, E, H,?

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#Question id: 23389

#Aptitude

G, H, J, M, ....., V