Ravi and Kavi start a business by investing â‚¹ 6000 and â‚¹ 72000, respectively. Find the ratio of their profits at the end of year.  Select the correct option.
A) 2 : 12
B) 5 : 12
C) 7 : 12
D) 1 : 12
E) 3 : 12

Rationale: "ratio of profit = ratio of investments = 6000 : 72000 = 1 : 12 answer : d"
Answer: D