The correct option is A
1 and 2 only
Statements 1 and 2 are correct: In situ conservation means the conservation of ecosystems and natural habitats and the maintenance and recovery of viable populations of species in their natural surroundings. For example, National parks, Biosphere Reserve, Wildlife sanctuary, sacred groves, etc.
Statements 3 and 4 are incorrect: Zoological parks are ex-situ conservation methods which involve captive breeding of animals. Similarly, seed banks protect and conserve seed at a different location from the origin of seeds.