Which of the following can be considered as the causes for the decline of trade and commerce in north India between AD 750 and 1200?

(i) Availability of little surplus production

(ii) Emergence of a wide variety of local weights and measures

(iii) Decrease in the use of coins

(iv) Unstable political conditions and constant fighting

(v) Decline of the Roman and Sassanid empires

Choose the answer from the codes given below: