Magnification is also defined as the of image distance and object distance.

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Solution

The correct option is B ratio
Magnification of a lens is defined as the ratio of the height of image to the height of the object. It is also defined as the ratio of image distance to object distance.
$m a g n i f i c a t i o n = \frac{h e i g h t o f i m a g e}{h e i g h t o f o b j e c t}$
Also $m a g n i f i c a t i o n = \frac{i m a g e d i s t a n c e}{o b j e c t d i s t a n c e}$

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Similar questions

Relate the image distance (v), object distance(u) , image height(h') and object height(h) for the formula of magnification (M).

Magnification = \frac{Image distance}{Object distance}

is the correct representation of the magnification formula.

For the image formation in a concave mirror, the object distance is 5 cm and the image distance is 15 cm on the same side as that of the object. Find the magnification and nature of the image.

Relate the image distance ( $v$ ), object distance ( $u$ ) , image height ( $h^{^{'}}$ ) and object height ( $h$ ) to the formula of magnification $(M)$ for a mirror.

Q. The magnification of a lens is given by
(v = Image distance and u = Object distance as per sign convention)

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Magnification is also defined as the of image distance and object distance.

The correct option is B ratioMagnification of a lens is defined as the ratio of the height of image to the height of the object. It is also defined as the ratio of image distance to object distance. magnification=height of imageheight of object Also magnification=image distanceobject distance