The following data gives the amount of manure (in thousand tonnes) manufactured by a company during some years: Year               1992      1993                       1994      1995                       1996      1997 Production (in Thousand tonnes)    15                       35          45                       30          40                       20 Represent the above data with the help of a bar graph. Indicate with the help of the bar graph the year in which the amount of manufactured by the company was maximum. Choose the correct alternative: The consecutive years during which there was maximum decrease in manure production are: 1994 and 1995               (b)  1992 and 1993 1996 and 1997               (d)  1995 and 1996