The ignition temperatures of four substances, P, Q, R, and S, are \[{{ – McqOptions

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1.	The ignition temperatures of four substances, P, Q, R, and S, are \[{{125}^{o}}C\], \[{{270}^{o}}C\], \[{{155}^{o}}C\], and \[{{310}^{o}}C\] respectively. Which of the following pairs of substances catches fire at \[{{250}^{o}}C\]?
A.	Q and S
B.	P and R
C.	R and S
D.	P and Q
Answer» C. R and S

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