The company J K Dey and sons manufactures of three types...

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The company J. K. Dey and sons manufactures of three types of flame safety lamps are . . . . . . . .

A. GL-5, GL-50, GL-60

B. GL-4, GL-3

C. Velox 1, Velox 2, Velox 3

D. None

Answer: Option A

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