खालील आकृतीमध्ये एकूण किती आयत आहेत ?

The correct answer is Option D (20).

Key Points:
• The key concept is counting geometric figures systematically.
• To count rectangles in a structured grid, we count individual blocks, then combinations of 2 blocks, 3 blocks, etc.
• By systematically counting all horizontal and vertical rectangle combinations in the given complex grid, the total number of rectangles amounts to 20.
• Ensure not to double-count squares (which are also mathematically rectangles) and combinations.
• Key Takeaway: Use systematic combination counting (1x1, 1x2, 2x1, 2x2 grids) to find the total number of rectangles.