General Intelligence · Conditional Coding

In this question, a group of numbers/symbols is coded using letter codes as per the table given below and the conditions which follow. What is the correct combination of codes for the sequence: 3 $ 7 % 2 Number/symbol57+3 # 1 % & 4 @ 2 8 6 Code D G K L W R T U B C X M P F Conditions: - If the first element is a number and the last a symbol, the codes for these two (the first and the last elements) are to be interchanged. - If the first element is an odd number and the last an even number, the first and last elements are to be coded as ©. - If both the third and fourth elements are even numbers, the third element is to be coded as the code for the second element.