The correct option is
D 9.10 mImage distance = object distance for a plane mirror, so, as the humming bird is 3.3 m in front of the mirror, the image is 3.3 m behind the mirror. Now, the distance between the mirror and the camera, along the direction perpendicular to the mirror is 4.3 m. (That is the physics translation of the English 'The camera is 4.3 m in front of the mirror'!). So, the distance from the image to the camera along this direction (English=in front of the mirror, again) is 4.3 m + 3.3 m = 7.6 m.
Also, it is given that the bird is 5 m to the right of the camera, so, the image will also be 5 m to the right (physics = 5 m along the mirror's direction). Hence, the image is 5 m along the mirrors direction, and 7.6 m along the direction perpendicular to it. (English = 5 m to the right and 7.6 m in front of the camera!). Using Pythagoras theorem, the total distance
=√7.62+52=9.1m.