SSC NTA Delhi University Non-Teaching 2021 Mock Test General Science Physics

क्ष-किरणांचा शोध कोणी लावला?

1
न्यूटन
2
हेन्री बेकरेल
3
डब्ल्यू.सी. राँटगेन
4
जे.डब्ल्यू. रिटर

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