resistance of a wire on its standard error given that the length of the wire is 100cm and the diameter of the wire is 1.91mm

Ohm's law tells you that i = v/r where v is equivalent voltage and r is equivalent resistance of the circuit
since all circuits have the same voltage, your question is really asking which circuit has the lowest total resistance, since the lower the resistance, the higher the current
circuit a has a resistance of 5 ohms; circuit c is in series so has a resistance of 10 ohms; circuit b is in parallel and therefore has a resistance of 2.5 ohms (review your notes on adding resistances in parallel and series); therefore b has the highest current

What the heck r u talkin bout? ?

The anwser is: wave a has a greater pitch and frequency.