The alphabet "H" has rotational symmetry of order

The correct option is C (2)

If you turn or rotate a figure about a point of H, then the figure look the same from all directions, this kind of symmetry is called rotational symmetry.
And the order of rotational symmetry of a figure is the number of times it can be rotated around a full circle and still look the same.
From above figures, the 'H' appears same after the rotation of ${180}^{\circ }$ and ${360}^{\circ }$
Hence, order of rotation is 2.