Best Science and Technology book for UPSC preparation. यह किताब latest developments और technology topics को cover करती है. prelims के लिए important topics और PYQs शामिल हैं.
Science and Technology Book by Ravi Agrahari McGraw Hill (Edition 2025)
Comprehensive Science and Technology book for UPSC exam covering current developments space technology biotechnology and previous year questions for prelims preparation.
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