डब्ल्यू. रांटगेन
General competitive examinations frequently test candidates on Current Affairs topics. Questions like "एक्स-रे किरणों का आविष्कार करने वाले थे?..." are designed to verify factual recall and general awareness. Regular practice on similar MCQs ensures a higher accuracy rate. The correct option here is डब्ल्यू. रांटगेन.