Physics

Assertion (A) : For a real image formed by a spherical mirror, linear magnification (m) is positive.
Reason (R) : Both u and v are negative for a real image.
both A and R are true and R is the correct explanation of A
both A and R are true and R is not the correct explanation of A
assertion is false but reason is true
assertion is true but reason is false

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assertion is false but reason is true

Explanation

Only a concave mirror can form a real image; convex mirrors cannot.

For a real image formed by a concave mirror:

Both $u$ and $v$ are negative.
Magnification $m = -\dfrac{v}{u}$ is negative, showing the image is inverted.

So the assertion is false (m is negative), but the reason is true (both distances are negative).

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