"3D printing" has applications in which of the following? 1. Preparation of confectionery items 2. Manufacture of bionic ears 3. Automotive industry 4. Reconstructive surgeries 5. Data processing technologies Select the correct answer using the code given below:

The correct answer is (d) because 3D printing (additive manufacturing) is a versatile technology used to create complex structures in food (confectionery), medicine (bionic ears and reconstructive surgeries), and engineering (automotive). While "data processing technologies" might seem unrelated, 3D printing is increasingly used to manufacture intricate electronic components, circuit boards, and photonic crystals essential for advanced computing hardware. The question tests the broad, cross-sectoral utility of emerging technologies, where restrictive options often fail to account for rapid innovations in materials science.