Lens formula for converging lens real image

Steps:

• Identify the image position from the diagram as beyond the focal point on the opposite side for a real image.
• Apply the lens formula: 1/v - 1/u = 1/f, where v is positive for real image, u negative in sign convention.
• Solve for u given fixed v and f: u = (v f)/(v - f), ensuring u > f in magnitude for real image.
• Match calculated u to the choice showing object beyond 2f or appropriate distance.

Why A is correct:

• Option A places object at distance greater than 2f, producing real image at the shown position per lens formula symmetry for inverted, same-size image.

Why the others are wrong:

• B places object between f and 2f, yielding larger real image, not matching shown position.
• C places object at f, producing image at infinity, not the finite shown position.
• D places object inside f, yielding virtual image on same side, not real.

Final answer: A