The payment mechanism typical to e-business

(a) cash on delivery (CoD)

(b) cheques

(c) credit and debit cards

(d) e-cash

The payment mechanism that is typical to e-business is e-cash. The other payment mechanisms mentioned—CoD, cheques, and credit or debit cards—are used for transactions in traditional modes of business as well as in e-business. However, e-cash payment can be made only in the case of online transactions and cannot be used in traditional modes of business.

Hence, the correct answer is option (d).