Q.Strong, sharp spines that get attached to animal's feet are found in the fruits of

Step 1. Identify the mechanism described. 'Strong, sharp spines that get attached to animal's feet' describes an epizoochorous mode of dispersal — the fruit's own surface armature (spines/hooks), not a fleshy reward, is what lets it hitch a ride on a passing animal to a new site.

Step 2. Check each option's actual fruit type. (a) Argemone (prickly/Mexican poppy) produces an oblong capsule whose entire surface is covered with numerous stout, sharp spines/prickles — this matches the description directly, since a dry spiny capsule of this kind readily snags onto the fur or feet of a passing animal. (b) Ecballium (squirting cucumber) disperses instead by an explosive, pressure-driven squirting of its fruit contents — a mechanical/ballistic (autochorous) method, and its fruit is not spine-covered. (c) Heritiera is a mangrove tree whose fruit is a woody, keeled, buoyant nut built to float and disperse on water currents (hydrochory), not to cling to an animal's feet. (d) Crossandra's fruit is a smooth capsule that splits o …

Match the described dispersal adaptation (a spiny fruit surface for external animal attachment) to the real fruit structure and known dispersal mechanism of each named ge …

• Assuming any capsule-fruited plant in the list could be the answer without checking its real dispersal mechanism
• Confusing Ecballium's explosive seed-squirting with an animal-attachment (zoochorous) mechanism …