Two labourers L and M start at the same point. L walks 10 m South, then turns left and walks 25 m. In the meanwhile M walks 20 m West, then turns to his right and walks 15 m , then turns East and walks 45 m. Where is M with respect to L?
High-efficiency particulate air (HEPA), also known as high-efficiency particulate absorbing and high-efficiency particulate arrestance, is an efficiency standard of air filter.
A sentence has been given in Active/Passive Voice. Out of the four given alternatives, select the one which best expresses the same sentence in Passive/Active Voice.