A horizontal force T of 100N is applied to a box of books of 20kg resting on a wooden table. Show that the box slides if the coefficient of friction of the box and
the table is 0,40. If the box slides what is its acceleration? Normal force between the
box and the table is mg= 196N
​

Where are the options ?

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