Science Fiction Escape

Details

Today the wretched day for Dona! Dona was doing her 12th grade. Today she was supposed to complete her chemistry lab experiments. With laziness she was doing it. All other students of her class completed the experiments and went out of the lab. After that she got tensed and planned to do her work fast. With tension she added two non-sinking solutions that led to the occurrence of some gas. That gas made her drowsy and she fell down. Without knowing the presence of her lab assistant locked the lab and went. She came conscious and then she realized that she got trapped inside the lab. She needs your help to escape.