Correct option is A
The correct one-word for the given group of words is (a) Pack.
A pack refers to a group of wild animals, especially wolves or dogs, that live and hunt together. (भेड़ियों का झुंड)
Example: A pack of wolves was seen near the forest.
Meanings of the given other options:
· herd: group of cattle, elephants, etc. (झुंड)
· flock: group of birds or sheep. (झुंड)
· drove: group of animals being driven together. (चलाई जा रही जानवरों की भीड़)