Three point masses each of mass m are placed at the three corners of an equilateral triangle of side x. Find the resultant force acting on any one particle at the corner.

• A. Zero
• B. \(\frac{{3{\rm{\;}}G{m^2}}}{{{x^2}}}\)
• C. \(\frac{{G{m^2}}}{{{x^2}}}\)
• D. \(\frac{{\sqrt 3 {\rm{\;}}G{m^2}}}{{{x^2}}}\)