UPSC Civil Services Model Paper 4

Yew has undergone a recent, range-wide population decline of at least 50% as per IUCN.
Throughout its range in the western Himalayas , it is declining in response to a range of threats.
In Afghanistan , up to 50% of the forests where it occurs have been destroyed or heavily logged (UNEP 2003) over the last 30 years.
In northwest India and western Nepal , exploitation associated with Taxol production has led to a national decline of up to 90% in Taxus populations throughout the country.
Also, in other countries such as Pakistan, overexploitation for fuel, fodder, and medicinal use has led to a significant decline.
The decline is continuing and while the causes are largely understood, in many areas they will not be reversible. On this basis, an assessment of Endangered is warranted. So, options 1, 2 and 3 are NOT correct.