5. Stars A, B, C and D are blackbodies. Their fluxes in the 500 nm and 800 nm wavebands have been measured. The peak of the blackbody curve lies between the two wavebands in each case. The results are given in the table below. Rank the stars in ascending order of surface temperature.
Star F(@200nm)/F(@800nm)
A 3.45x10^-2
B 1.00
C 2.82
D 1.67x10^-2
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