Central Board Of Secondary Education [CBSE] — mistake in marking scheme for evaluation of cbse science paper 2019 for class x

In cbse science paper 2019 for class x (Series jsm/4 set-2 code 31/4/2) in question no 13 there is a part of the question “draw a ray diagram to show the path of light when two identical glass prisms are arranged together in inverted position with respect to each other and a narrow beam of white light is allowed to fall obliquely on one of the faces of the prisms.” for this question the cbse answer scheme is only considering the figure given in ncert science book for class x, but this figure is really wrong. If a student has drawn the correct figure differing from ncert should be given full mark. Much before the start of evaluation of science paper i have communicated about this to cbse office by email and postal letter, but there is no respond. The mistake is continued from many years.