The temperature reading taken using Centigrade and Fahrenheit thermometers are plotted on a graph -?C along X-axis, ?F along Y-axis. The shape of graph would be
[A].
Straight line cutting an intercept on the positive Y-axis
[B].
Straight line cutting an intercept on the positive X-axis
[C].
Straight line cutting an intercept on the negative Y-axis
[D].
Straight line cutting an intercept on the negative X-axis