Q9. The resistances of the platinum wire of a platinum resistance thermometer at the ice point and steam point are $8 \Omega$ and $10 \Omega$ respectively. After inserting in a hot bath of temperature $400 ^ { \circ } \mathrm { C }$, the resistance of platinum wire is :\\
(1) $10 \Omega$\\
(2) $8 \Omega$\\
(3) $16 \Omega$\\
(4) $2 \Omega$