Question

Which one of the following is an extinct animal?
A. Caspian tiger
B. Snow leopard
C. Seals
D. Siberian crane
E. None of these

Answer 1

Extinction means the termination of a kind of organism or a species. An organism is considered to be extinct when the last individual of the species dies. Capacity of breeding and recovery lost before this point.

Complete answer:
In the early 1970s Caspian tigers became extinct due to hunting of tigers and their prey. They also lost their habitat due to settlement in range. The Caspian tiger occurred in many regions such as, Turkey, Iran (northern), Iraq, Caucasus, and also in central Asia.
Seasonally flooded riverine land, trees, shrubs, and dense stands of tall reeds and grass up to six meters in height were the most common habitat for Caspian tigers. In the year 1970, the last tiger was killed near Tbilisi, Georgia after taking domestic livestock and the last tiger in Iraq was killed in the year 1887, near Mosul.
The snow panther, otherwise called the ounce, is an enormous feline local to the mountain scopes of Central and South Asia. It is recorded as Vulnerable on the IUCN Red List in light of the fact that the worldwide populace is assessed to number under 10,000 develop people and is required to decay about 10% by 2040.
Pinnipeds, usually known as seals, are a broadly disseminated and assorted clade of rapacious, balance footed, semi aquatic marine warm blooded animals. They include the surviving families Odobenidae, Otariidae, and Phocidae. There are 33 surviving types of pinnipeds, and in excess of 50 terminated species have been portrayed from fossils.
The Siberian crane (leucogeranus), otherwise called the Siberian white crane or the snow crane, is a fowl of the family Gruidae, the cranes. They are unmistakable among the cranes; grown-ups are essentially all frigid white, aside from their dark essential quills that are noticeable in flight and with two rearing populaces in the Arctic tundra of western and eastern Russia. The eastern populaces move during winter to China while the western populace winters in Iran and once, in Bharatpur, India.

Hence, the correct answer is option (A).

Note: More than 99 % of all the species have died that ever lived on Earth. Around 8.7 million species of eukaryotic organisms and many more microorganisms were included in the extinction list.