A combination of two thin lenses of the same material with focal lengths \[{{f}_{1}}\] and \[{{f}_{2}}\], arranged on a common axis minimizes chromatic aberration, if the distance between them is [EAMCET 2005]

• A.            \[\frac{({{f}_{1}}+{{f}_{2}})}{4}\]                                    
• B.            \[\frac{({{f}_{1}}+{{f}_{2}})}{2}\]                                                                 
• C.            \[({{f}_{1}}+{{f}_{2}})\]   
• D.            \[2({{f}_{1}}+{{f}_{2}})\]