Which type of transformer increases the current level from primary to secondary? 

The correct answer is option 1):(Step down )

Concept:

Step-down transformer 

• A step-down transformer is used to decrease the voltage.
• This transformer  increases the current level from primary to secondary
• In a step-down transformer, the number of turns in the primary coil is More than the number of turns in the secondary coil.
• Np > Ns,I_p < I_s,Vp > Vs

Step-Up transformer 

• The step-up transformer is used to increase the voltage.
• In a step-up transformer the number of turns in the primary coil is less than the number of turns in the secondary coil.
• This transformer  Decreases the current level from primary to secondary
• N_p < N_s,I_p > I_s,V_p < V_s