General Knowledge Certification MCQs – Mock Test 255
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MCQ 1271: Igneous rocks that have highest content of silica are known as:
MCQ 1272: Transistors used in all modern electric products was invented in:
MCQ 1273: Telephone was invented in:
MCQ 1274: Specialized agency of United Nations which coordinates the postal policies among its member nations is known as:
MCQ 1275: The 'World Food Programme' was established in:
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