Three resistors are connected in parallel to the voltage source with resistors R1 = 30 Ω, R2 = 150 Ω and R3 = 90 Ω. A current of 200 mA flows through the resistor R3. How much current flows through the resistor R1? The current is expressed in mA.

none, its a machine

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.