Study the following bar-diagram carefully and answer the questions. The bar graph given below shows the foreign exchange reserves of a country (in million US $) from 1991 - 1992 to 1998 - 1999.
Ratio of the sum of foreign exchange during the years 1991-92, 1992-93, 1993-94 to that during the years 1995-96, 1996-97, 1997-98 is
31 : 35
35 : 31
37 : 52
37 : 52
C.
37 : 52
Required ratio = (2640 + 3720 + 2520) : (3120 + 4320 + 5040)
= 8880 : 12480 = 37 : 52
