RAS Pre cum Mains – Science & Technology (Part-I), Paper-II, Unit-II, New Edition 2026, published by Samyak – An Institute for Civil Services (an ISO 9001:2015 certified institute), is an English medium book on Science and Technology (विज्ञान एवं प्रौद्योगिकी). It is written for the RAS exam conducted by the Rajasthan Public Service Commission (राजस्थान लोक सेवा आयोग). The book is written in English; it is not the Hindi medium edition. As the cover states, it is revised and updated as per the new syllabus (नवीन पाठ्यक्रम). The book covers the first part of the Science & Technology unit of Paper-II, Unit-II (प्रश्नपत्र-II, इकाई-II) of the RAS Mains syllabus. Because it is a pre cum mains book, it serves both stages of the exam: RAS Prelims: builds the factual base needed for objective science questions RAS Mains: builds the conceptual understanding needed for descriptive answers As printed on the cover, the book is based on NCERT, RBSE, Hindi Granth Academy (हिंदी ग्रन्थ अकादमी), class notes and standard books. Candidates therefore get the important content from all these trusted sources in one place. Key Features: English medium: written in English (not Hindi medium) Science & Technology Part-I for RAS Paper-II, Unit-II Pre cum Mains: useful for both RAS Prelims and Mains Revised and updated as per the new syllabus Based on NCERT, RBSE, Hindi Granth Academy, class notes and standard books New Edition 2026 Published by Samyak – An Institute for Civil Services यह पुस्तक "RAS प्री कम मेन्स – विज्ञान एवं प्रौद्योगिकी (भाग-I), प्रश्नपत्र-II, इकाई-II", नया संस्करण 2026, सम्यक – एन इंस्टीट्यूट फॉर सिविल सर्विसेज़ (Samyak) द्वारा प्रकाशित है। यह अंग्रेजी माध्यम (English Medium) में है; यह हिंदी माध्यम का संस्करण नहीं है। यह पुस्तक नवीन पाठ्यक्रम के अनुसार संशोधित एवं अद्यतन है। यह NCERT, RBSE, हिंदी ग्रन्थ अकादमी, कक्षा नोट्स एवं मानक पुस्तकों पर आधारित है। यह पुस्तक राजस्थान लोक सेवा आयोग की RAS प्रारंभिक एवं मुख्य परीक्षा, दोनों की तैयारी हेतु अत्यंत उपयोगी है।