11. The eyepiece of a refracting telescope has a focal length of 90 cm. The distance between objective and eyepiece is 1.8 m and the final image is at
infinity. What is the angular magnification of the telescope?
Give solution​

there is no correct list among the choices you've provided.

the list might look something like this:

-- baby human

-- piccolo

-- flute

-- soprano singer

-- trumpet

-- tenor singer

-- trombone

-- baritone singer

-- baritone horn

-- bass singer

-- tuba

since i had to make up the list myself, i made it easy on myself, and i didn't try to shuffle the string instruments and woodwinds into it too.