From the publisher VK global publications Pvt. Limited Is a household name now. Established in 1979, with more than three decades of leadership in the area of economics and commerce, we take pride in claiming that we continue with the unstirred readership in the country. Specializing in the area of economics and commerce, we are not averse to the idea of diversification. Keeping this in view, more than a decade ago, a series of 'exam idea' Was launched in all the subjects For classes IX -XII however, success of our publication is admittedly due to prudent prolific writers. We have resource-pool of reputed authors, who leave no stone unturned in bringing out the best of study material, which makes our readers versatile in their thought processes and equips them with the exam-oriented acumen. Thousands of acknowledgment and accolades that we receive every year from our readers are a good testimony to the efforts and trustworthy endeavors of our authors the book has been designed topic and subtopic-wise, keeping the students’ needs in mind.