JEE Main Physics question

The potential energy as a function of the force between two atoms in a diatomic molecule is given by U(x) = a/x¹² − b/x⁶, where a and b are positive constants and x is the distance between the atoms. The position of stable equilibrium for the system of the two atoms is given by

• (A)x = (a/b)^(1/6)
• (B)x = (b/a)^(1/6)
• (C)x = (3a/b)^(1/6)
• (D)x = (2a/b)^(1/6)Correct