A book store shopkeeper gives books on rent for reading. He has variety of books in his store related to fiction , stories and quizzes etc. He takes a fixed charge for the first two days and an additional charges for subsequent day . Amruta paid Rs 22 for a book and kept for 6 days, while Radhika paid Rs 16 for keeping the books for 4 days.

Assume that the fixed charge be rs x and additional charge (per day) by Rs y.
Based on the above information answer and four of the following questions:
The situation of amount paid by Radhika is algebraically repesented by .

Options

A. `x - 4y = 16`
B. `x + 4y = 16`
C. `x - 2y = 16`
D. `x + 2y = 16`