Explanation:

CAD is a widely recognized acronym in engineering, architecture, and manufacturing industries. It stands for Computer-Aided Design. CAD software utilizes computer technology to assist in the design, drafting, analysis, and manufacturing processes of products and structures. It allows designers to create precise 2D drawings and 3D models, improving efficiency and accuracy. Options (a) "Computer algorithm for design" and (c) "Computer application in design" are not the correct, established full form of the acronym. Therefore, option (d) "All of these" is incorrect, as only option (b) accurately represents what CAD stands for.