Two small bar magnets are placed in a line with like poles facing each other at a certain distance d apart. If the length of each magnet is negligible as compared to d, the force between them will be inversely proportional to [CPMT 1971; NCERT 1971; MP PMT 1992]

• A.            \[d\]                                        
• B.            \[{{d}^{2}}\]
• C.            \[\frac{1}{{{d}^{2}}}\]      
• D.            \[{{d}^{4}}\]