Figure A is related to B following a certain pattern.

Solution

For shapes: The logic followed here is as follows: The shapes rotate 90° in clockwise direction from figure A to B. Similarly, the shapes will rotate 90° in clockwise direction from figure C to D. For numbers: The logic followed here is as follows: 23 (figure A) The immediate succeeding prime number is added to the number given in figure A to get the number of figure B. 23 + 29 = 52 41 (figure C) The immediate succeeding prime number is added to the number given in figure C to get the number of figure D. 41 + 43 = 84 (figure D)