Which of the following is not a method of ex-situ conservation?

Which one of the following is an example of $ex \, situ$ conservation?

Plants like $Aegle \text{ } marmelos$, $Ocimum \text{ } sanctum$ and $Ficus \text{ } religiosa$ are a group of plants designated as

Which of the following is an in situ conservation method?

Which of the following regions in India is considered a biodiversity hotspot that requires immediate attention?

Statement $I$: In many cultures,tracts of forest were set aside,and all the trees and wildlife within were venerated and given total protection; these are referred to as sacred groves.
Statement $II$: In Meghalaya,the sacred groves are the last refuges for a large number of rare and threatened animals.