The focal length of the eye-piece of an astronomical telescope is f₁, while the focal length of the object is f₂. Fro normal adjustment, the angular magnification is given by

• A.\(\frac{f_2}{f_1}\)
• B.1 - \(\frac{f_2}{f_1}\)
• C.\(\frac{f_2}{f_1}\) - 1
• D.\(\frac{f_1}{f_2}\)