The population of a town is 10000. It increases annually at the rate of 20% p.a. What will be its population after 1 year?  Select the correct option
A) 12300	B) 12350	C) 12000	D) 12500	E) 12600

Rationale: "formula : ( after = 100 denominator ago = 100 numerator ) 10000 ã — 120 / 100 = 12000 c"
Answer: C