Q10. On celcius scale the temperature of body increases by $40 ^ { \circ } \mathrm { C }$. The increase in temperature on Fahrenheit scale is\\
(1) $68 ^ { \circ } \mathrm { F }$\\
(2) $75 ^ { \circ } \mathrm { F }$\\
(3) $72 ^ { \circ } \mathrm { F }$\\
(4) $70 ^ { \circ } \mathrm { F }$