Answer: Option B
:
B
Whenever two plane mirrors are kept inclined to each other, multiple reflections takes place and multiple images are formed.
If the angle of inclination between two plane mirrors is '$x$' degrees, the number of images formed, '$\text{n}$' is given by,
$\text{n}=\frac{360}{\text{x}}-1$
In this case, $\text{x}$ = 60 degrees.
$\text{n}=\frac{360}{\text{60}}-1$
$\text{n}=\text{6}-1$
$\text{n}=\text{5}$
Thus, the number images formed is 5.