 
<translate> P ((1 + 20/100) n > 2P ko (6/5) n > 2 Yanzu, (6/5 * 6/5 * 6/5 * 6/5) > 2. Saboda haka, n = shekara 4. Amsar ita ce (B). <eng> P(1 + 20/100)n > 2P or (6/5)n > 2
Now, (6/5 * 6/5 * 6/5 * 6/5) > 2. So, n = 4 years.
So, the answer is (B). 