Correct option is B
Explanation-
A. Honey bee → iv. Neonicotinoids
Neonicotinoids are a class of systemic insecticides that affect the nervous system of insects, including bees. They are highly toxic to pollinators, even at sublethal levels, affecting - Navigation, reproduction and immune response
Impact: One of the primary causes behind Colony Collapse Disorder (CCD).
B. Gyps vulture → iii. Diclofenac
Diclofenac is a veterinary non-steroidal anti-inflammatory drug (NSAID) used in livestock. Vultures feeding on carcasses of animals treated with diclofenac suffer kidney failure and die. This has led to a drastic decline (over 95%) in Gyps vulture populations across South Asia.
C. Shellfish → i. Methylmercury
Methylmercury is a toxic compound that bioaccumulates in aquatic food chains. Shellfish accumulate methylmercury from contaminated water and sediments. High concentrations affect growth, reproduction and survival. Also a concern for human health via seafood consumption.
D. Minnow → ii. Synthetic oestrogen
Synthetic estrogens (like ethinylestradiol, used in birth control pills) enter water bodies via sewage. They act as endocrine disruptors in fish like minnows, causing feminization of male fish, reproductive failure and leads to population decline and ecosystem imbalance.
Correct match - A-iv, B-iii, C-i, D-ii ( Option b )
