Select the correct active voice of the given sentence. These things have been left here by an unknown customer.

A An unknown customer leaves these things here.

B An unknown customer has left these things here.

C An unknown customer have left these things here.

D An unknown customer has been left these things here.

Correct Answer: Option B

by উঠে যাবে +object হয়ে যাবে subject+ have/has been+sub হয়ে যাবে object