# At what rate percent per annum will Rs. 75,000 yields a compound interest of Rs. 6,120 in 6 months, if the interest is being compounded quarterly? Calculate the simple interest at the same rate of interest for 18 months.

A 20%, Rs. 18,000
B 16%, Rs. 18,000
C 25%, Rs. 20,000
D 18%, Rs. 20,000
E None of these

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