Page 2 - GK-8

ACKNOWLEDGEMENTS
All product and brands name used in this book are trademarks,
registered trademarks or trade names of their respective owners.

Ó LEVROS EDUTECH BOOKS PRIVATE LIMITED
COVID-19
First Published :- 2015

Second Edition :- 2018
Third Edition :- 2019
Revised Edition :- 10th January 2023

This book is sold subject to the condition that it shall not by way of trade or otherwise
,be lent,resold,hire out or otherwise circulated without the publisher's prior written
consent in any form of binding or cover other than that in which it is published and
without a similar condition including this condition being imposed on the subsequent
purchaser and without limiting the right under copyright reserved above .no part of this
publication may be reproduced ,stored in or introduced into a retrieval system ,or
transmitted in any form or by any means, electronic, mechanical, photocopying,
recording or otherwise , without the prior written permission of both the copyright
owner and the above –mentioned publishers of this book.

Illustrations and images :-
Levros Edutech Books Team, New Delhi

Printed at :-
S.S. Offset Printers, New Delhi

Head office :-
2075,sector 49,Faridabad,Haryana-121001
Website:- www.levrosedutechbooks.com

Office emails:- sales@levrosedutech.com
order@levrosedutech.com

Published by :-
LEVROS EDUTECH BOOKS PRIVATE LIMITED
2075, Sector 49, Faridabad, Haryana -121001
CIN:- U22300BR2020PTC049127

TAN:- PTNL01246A
PAN:- AAECL4149G