I need a quick answer, don't explain just choose the correct option

Suppose there are only two individuals A and B in the economy with utility function of first individual given as U(A) = In(x1) + y12, and utility function of second person given as, U(B) = x2^0.5 + In(y2). Which of the following provides for the equation of contract curve. x1/x2 = y1/y2 O In(x1) + y12 = x2^0.5 + In(y2) O x2^0.5/2 x1 = y2/y1 O y1/y2 = x^20.5/x1