Arrange in hierarchical order by date the following inventions:
I. - Census machine; Il. - Abacus; lll. - Slide rule; IV.- Difference engine.
a
I, lI, IlI and IV
b
I, Il, III and IV
c
I, II, IV and llI
d
II, III, IV, and l
Explanation
Correct Option
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Umniyaa
2 years ago
The answer is supposed to be.... Abacus, slide rule, difference engine and census machine. In order of invention

