An object is placed in front of a spherical mirror, and a $2$ times magnified image is formed on a screen. Choose the $\text{CORRECT}$ option.
- AMirror is concave, $m = +2$
- BMirror is concave, $m = -2$
- CMirror is convex, $m = +2$
- DMirror is convex, $m = -2$
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