Alternative approach: As we are dealing with all variable problem
Let's say a gold cost Rs 100 in the year 2001 so S = 100
Assume X = 10 %
So the value in 2002 - Rs. 90 and in the year 2003 Rs. 81
Hence T = 81
Option E - (8100)^0.5 = 90 = (TS)^0.5
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