Madhu is working as Lab technician in Blood bank. She is responsible in collecting blood from donor and maintenance of all instruments of Blood bank. The basic equipment for blood collection are used as Blood donor couches, Blood collection monitor, Blood bags and Tube sealer. She is basically using the equipment for blood component preparation are Electronic weighing machine, Refrigerated centrifuge, Plasma expressor and Cell separator. As a part of hospital when she has to supply the blood bags for the recipients then she is responsible to test the blood and the basic instruments that are used as ABO grouping and Infectious disease testing. For maintaining the activity of blood bank in proper way she has to handle autoclave, incubator, microscope, hot air oven, laminar flow cabinet also.The instrument is mainly used by Madhu for the following purposes. 1. Dry sterilization of syringes & needles. 2. Preparation of anticoagulated bulbs. 3. Drying of glass ware. 4. Heating of chemicals used for the preparation of primary standards. Identify the instrument. a) Incubator b) Microscope c) Hot air Oven d) Laminar flow cabinet