Amit and Vinit both started a business together with an initial investment of Rs. 3x and Rs. 4x, respectively. After 4 months, Rachit joined the business with Rs. 6y. The share of annual profit received by Amit is equal to the share of annual profit received by Rachit. The values given in which of the following options can be the value of x and y respectively in order to make the above statement true:

A) 400, 300

B) 600, 450

C) 540, 405