In how many of these years, the aggregate number of marks allotted to all the topics is less than the aggregate number of marks allotted to all the topics in the year 1999 but more than aggregate number of marks allotted to all the topics in the year 2001?
As the aggregate of all the marks allotted to all the subjects across various years as following
Year199819992000200120022003Aggregate marks185165165150150150
As we can see that there is no number between aggregate of year 1999 (165) and aggregate if year 2001 (150). Hence answer is option (a).
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