The direction of conventional current in a conductor is assumed in the direction of flow of 

• Electric current: The rate of flow of electric charge is called electric current.
  • The SI unit of electric current is Ampere (A)

Hence, Electric current (I) = Q/t = Charge/time

EXPLANATION:

• The direction of the conventional current corresponds to the direction of positive charges which is from higher potential(positive) to lower potential(negative). So option 3 is correct.
• Electric current is associated with the movement of electrons which is from lower potential(negative) to higher potential(positive), therefore, the direction of electric current is opposite to that of conventional current.

NOTE:

• The direction of electric current is always opposite to the direction of conventional current in metallic conductors.