The accelerations of a particle oscillating simple harmonically at distances x₁ and x₂ from the mean position are a₁ and a₂ respectively. Then, the period of oscillation is

(Α) 2π √ x₂ - x₁ / a₂ - a₁
(Β) 2π √ x₁ - x₂ / a₂ - a₁
(C) 2π, √ x₁ - x₂ / a₁ - a₂
(D) none of these