A. Coins
B. Inconvertible paper money
C. Commodities
D. Abacus
Correct Answer: Option D
D. Abacus
Explanation
Abacus is one of the counting devices used in the olden days. It does not serve as money.
A. Coins
B. Inconvertible paper money
C. Commodities
D. Abacus
Correct Answer: Option D
D. Abacus
Explanation
Abacus is one of the counting devices used in the olden days. It does not serve as money.
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