Find the odd word out.
1. Definitions of money not given by
(a) Walker
(b) Crowther
(c) Marshall
(d) Seligman
2. Not a good quality of money
(a) Homogeneity
(b) Portability
(c) Cognizability
(d) Changing the value of money
3. Not a standard of deferred payment
(a) Paper money
(b) Commodity money
(c) Bills of exchange
4. Not a metallic money
(a) silver
(b) stones
(c) aluminium
(d) nickel