सन 1960 के दशक में
General competitive examinations frequently test candidates on Current Affairs topics. Questions like "भारत में लेसर प्रौद्योगिकी की शुरुआत हुई-..." are designed to verify factual recall and general awareness. Regular practice on similar MCQs ensures a higher accuracy rate. The correct option here is सन 1960 के दशक में.