Sacred groves are found in:

The correct answer is Option (3) → Meghalaya

Sacred groves are patches of forest set aside by local communities because of religious beliefs. All the trees and animals in them are fully protected, so they serve as a form of in situ conservation. In Meghalaya, the sacred groves are the last refuges for many rare and threatened plants.

(1) Odisha — Incorrect. Odisha is not among the places listed in NCERT for sacred groves.

(2) Tamil Nadu — Incorrect. Tamil Nadu is not among the places listed in NCERT for sacred groves.

(3) Meghalaya — Correct. Sacred groves are found in the Khasi and Jaintia Hills of Meghalaya. Other places are the Aravalli Hills of Rajasthan, the Western Ghats of Karnataka and Maharashtra, and the Sarguja, Chanda and Bastar areas of Madhya Pradesh.

(4) Himachal Pradesh — Incorrect. Himachal Pradesh is not among the places listed in NCERT for sacred groves.

NCERT Extract:
How Do We Conserve Biodiversity? – “… In many cultures, tracts of forest were set aside, and all the trees and wildlife within were venerated and given total protection. Such sacred groves are found in Khasi and Jaintia Hills in Meghalaya, Aravalli Hills of Rajasthan, Western Ghat regions of Karnataka and Maharashtra and the Sarguja, Chanda and Bastar areas of Madhya Pradesh.”