Answer : Alternating current.
Explanation :
We know that electric current is defined as the electric charge divided by time. There are two types of current i.e. direct current (D.C) and alternating current (A.C)
- Direct current: The flow of electric charge in one direction is called as direct current. It was produced firstly by Alessandro Volta in 1800. One of the examples of direct current is the battery.
- Alternating current: The flow of electric charges that reverses the direction periodically is known as alternating current.
Alternating current flows in our houses.
Hence, the correct option is(B) " Alternating current "