The correct answer is indeed option 4, as “3D Printing” indeed has applications in all the given scenarios.

1. Preparation of confectionery items: 3D printing technology has been used in culinary arts for creating intricate designs and shapes which are otherwise impossible or very time-consuming to manufacture by hand.

2. Manufacture of bionic ears: Bionic ears or artificial ears have been produced using 3D bio-printing, demonstrating the possibilities of 3D printing in the field of medical prosthetics.

3. Automotive industry: The automotive industry uses 3D printing for prototyping, tooling, and producing parts, significantly reducing production time and cost.

4. Reconstructive surgeries: In reconstructive surgeries, 3D printing can be used to create patient-specific implants and surgical guides, increasing surgical precision and reducing operative time.

5. Data processing technologies: While seemingly irrelevant to 3D printing, the advanced algorithms that are necessary for interpreting objects and designs to be printed indeed fall under data processing technologies. Hence, the correct answer is option 4, which includes all of these applications.