Two resistances \[{{R}_{1}}\] and \[{{R}_{2}}\] are made of different materials. The temperature coefficient of the material of \[{{R}_{1}}\] is \[\alpha \] and of the material of \[{{R}_{2}}\] is \[-\beta \]. The resistance of the series combination of \[{{R}_{1}}\] and \[{{R}_{2}}\] will not change with temperature, if \[{{R}_{1}}/{{R}_{2}}\] equals [MP PMT 1997]

• A.            \[\frac{\alpha }{\beta }\]
• B.            \[\frac{\alpha +\beta }{\alpha -\beta }\]
• C.            \[\frac{{{\alpha }^{2}}+{{\beta }^{2}}}{\alpha \beta }\]       
• D.            \[\frac{\beta }{\alpha }\]