Acurrent 1a in the human body is extremely dangerous.
a) estimate the potential difference needed to produce this current.
b) suggest why your are unlikely to be injured by an electric current in your house.

answer both questions.

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.