Arrange the following theories of international trade in chronological order as they appear :
(a) Theory of Opportunity Cost
(b) Theory of Comparative Cost
(c) Factor Price Equalisation Theorem
(d) Theory of absolute cost
Identify the correct chronological order.
1
(d), (b), (a), (c)
2
(c), (b), (d), (a)
3
(b), (d), (a), (c)
4
(a), (c), (d), (b)