Write any two differences between Simple clock and Atomic clock.
​

Simple clocks measure time by counting, quartz crystal vibrations or mechanical pendulum oscillations. Atomic clocks measure the oscillations in electron transitions by the radition emited in the form of microwave or higher frequency electro magnetic waves.

Explanation:

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.