In India, the number of biosphere reserves and national parks are -

The correct answer is Option (2) → 14 biosphere reserves and 90 national parks

Biosphere reserves, national parks and wildlife sanctuaries are methods of in situ (on site) conservation. The plants and animals are protected in their natural habitat, so the whole ecosystem is protected with them.

The other three pairs of numbers, 25 and 100, 33 and 70, and 20 and 110, do not match the counts given in NCERT.

NCERT Extract:
How Do We Conserve Biodiversity? – …