3D Printing Technology Applications

3D printing has diverse real-world applications across multiple industries. Statement 1 is correct: 3D printers can create complex confectionery shapes and designs, particularly for decorative items and custom cakes. Statement 2 is incorrect: while 3D printing can create structural ear models, it has not yet been used to manufacture fully functional bionic ears as complete prosthetics. Statement 3 is correct: the automotive industry extensively uses 3D printing for prototyping, tooling, and manufacturing certain components. Statement 4 is correct: 3D printing is used in reconstructive surgeries to create patient-specific implants and surgical guides for procedures like maxillofacial reconstruction. Statement 5 is incorrect: 3D printing has no role in data processing technologies, which involve computation and algorithms, not physical manufacturing. The correct answer is 1, 3, and 4 only.

Answer: (a).