Let T denote a curve y = y(x) which is in the first quadrant and let the point (1, 0) lie on it. Let the tangent to I at a point P intersect the y-axis at Yp. If PYp has length 1 for each point P on I, then which of the following option is/are correct? 1+1-x X A. C. y = loge y = -loge 1+1-x X + B. xy' + 1-x - x = 0 D. xy' - 1-x= = 0