Chemical engineering plant cost index is used for finding the present cost of a particular chemical plant, if the cost of similar plant at some time in the past is known. The present cost of the plant = original cost × (index value at present/ index value at time original cost was obtained). The most major component of this cost index is

• A. Fabricated equipment and machinery
• B. Process instruments and control
• C. Pumps and compressor
• D. Electrical equipments and material