A concave spherical mirror with a radius of curvature of 0.2m is filled with water of Refractive index 4/3. The focal length of the system is -2.5 x. Value of x is ​

1. may 2. september 3. february, and december4. 70°f

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