Step 1: Recall the definition of conventional current.
Conventional current is defined as the flow of positive charge.
Step 2: Determine the direction of flow.
Since positive charges are assumed to move:
\[
\text{Conventional current flows from the positive terminal to the negative terminal}
\]
Step 3: Analyze the options.
(A) Direction of electron flow — incorrect
(B) Correct direction of conventional current ✔
(C) Incorrect — current has a defined direction
(D) Incorrect — current does not flow both ways
Step 4: Final conclusion.
The direction of conventional current is from positive terminal to negative terminal.
\[
\boxed{\text{(B)}}
\]