Which one of the areas marked as A, B, C and D in the given figure of the cyclone, witnesses heavy torrential short duration rainfall accompanied by thunderstorms?

1. The question asks to identify the area within a cyclone (marked A, B, C, D on a figure - figure not provided, analysis assumes standard cyclone structure representation) that experiences heavy torrential short duration rainfall accompanied by thunderstorms. 2. In a mature tropical cyclone, the most intense weather conditions, including the heaviest rainfall and strongest winds (often accompanied by thunderstorms embedded within the rainbands), occur in the eyewall – the ring of clouds surrounding the calm eye. 3. Spiral rainbands extending outwards from the eyewall also bring rain and squalls, but the most severe, torrential rain is typically concentrated in the eyewall. 4. The eye itself (often marked C for Centre or a distinct clear area) is calm with light winds and minimal rain. 5. Areas far from the center (peripheral regions) experience less intense weather. 6. Assuming the labels A, B, C, D correspond to different parts (e.g., periphery, outer rainband, eye, eyewall), the area representing the eyewall (likely D, based on the answer key) would witness the described conditions.