Which of the following is NOT listed as a special issue requiring a development letter?

The correct answer is identified because military service records, while critical for establishing a veteran's eligibility for benefits, are not categorized as a special issue that would specifically require a development letter. A development letter is typically used to gather additional information on specific issues that may complicate or enhance a claim.

In this context, herbicide exposure, hepatitis C, and asbestos exposure are recognized issues that often lead to complex claims. They frequently require a focused approach for evidence gathering, documentation, and clarification, thus necessitating a development letter to address these special concerns. Military service records, on the other hand, are foundational documents that veterans typically provide as a standard part of their claim submission, rather than issues that invoke specific additional requirements or clarifications.

Understanding the distinction between these categories helps clarify why military service records are not treated the same way as the other special issues, which have specific development needs due to their complexity or impacts on health outcomes in relation to military service.