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Vultures which used to be very common in Indian countryside some years ago are rarely seen nowadays. This is attributed to:

(a)

the destruction of their nesting sites by new invasive species disease among them

(b)

a drug used by cattle owners for treating their diseased cattle persistent and fatal

(c)

scarcity of food available to them

(d)

a widespread, persistent and fatal disease among them

Correct Answer

(b)

Explanation

Option (b) is correct. Vultures in India have declined dramatically due to the ingestion of diclofenac, a drug used to treat cattle. This drug causes kidney failure and visceral gout in vultures that consume the carcasses of treated animals. Despite the ban, illegal use continues, leading to a significant drop in vulture populations.