-Which Star in the Table Has the Highest Surface Temperature

$$\begin{array} { | l | c | c | } \hline { \text { Star } } & \begin{array} { c } \text { Parallax } \\\text { (sec of arc) }\end{array} & \begin{array} { c } \text { Spectral } \\\text { Type }\end{array} \\\hline 5 \text { Cen } & 0.026 & \text { B2 IV } \\\hline \text { HR 4758 } & 0.05 & \text { G0 V } \\\hline \text { HD 39801 } & 0.005 & \text { M2 I } \\\hline 9 \mathrm { CMa } & 0.4 & \text { Al V } \\\hline\end{array}$$
-Which star in the table has the highest surface temperature?

A) ? Cen
B) HR 4758
C) HD 39801
D) 9 CMa

Correct Answer:

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