The equation of a straight line which cuts off an intercept of 5 units on negative direction of y-axis and makes an angle 120° with positive direction of x-axis is

• A. \({\rm{y}} + \sqrt 3 {\rm{x}} + 5 = 0\)
• B. \({\rm{y}} - \sqrt 3 {\rm{x}} + 5 = 0\)
• C. \({\rm{y}} + \sqrt 3 {\rm{x}} - 5 = 0\)
• D. \({\rm{y}} - \sqrt 3 {\rm{x}} - 5 = 0\)