Subject :ICSO Class : Class 4
Select the INCORRECT match.
AAbacus - First calculating device invented in China.
BNapier's Bones - It was used for addition, subtraction, multiplication and division, made by Sir John Napier.
CDifference Engine - First automatic mechanical computer, designed by Charles Babbage.
DNone of these
Option B is correct but given wrong, please confirm
Ans 1:
Class : Class 5
B
Ans 2:
Class : Class 5
B