# The simple interest on a sum of money is $1\over9$ of the principal and the number of years is equal to the rate perecent per annum. The rate of interest per annum is â€“ (A) 1 $1\over9$ % (B) 2 $2\over3$ % (C) 3% (D) 3 $1\over3$ %

 [ A ]    a [ B ]    b [ C ]    c [ D ]    d
 Answer : Option D Explanation :