Ravi and Kavi start a business by investing â‚¹ 4000 and â‚¹ 72000, respectively. Find the ratio of their profits at the end of year.  Choose the correct choice from the following options:	A) 2 : 28	B) 5 : 28	C) 7 : 18	D) 1 : 18	E) 3 : 18

Rationale: "ratio of profit = ratio of investments = 4000 : 72000 = 1 : 18 answer : d"
Answer: D