LPG consists of mainly:______?

A:  Ethane, Hexane and Nonane

B: Methane, Ethane and Hexane

C:  Methane, Hexane and Nonane

D:  Methane, Butane and Propane

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 Methane, Butane and Propane

The average adult has a blood volume of about _____ liters.

A: 5

B: 4

C: 6

D: 7

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5

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