Which of the following describes an arrangement which has no focal point? Circular mass Right triangular Vertical Equilateral triangular

The correct answer is: Right triangular.<br /><br />A right triangular arrangement does not have a focal point. A focal point is a specific point in an arrangement where the lines of reflection or symmetry converge. In a right triangular arrangement, the lines of reflection or symmetry do not converge at a single point, making it the correct choice among the given options.