Correct option is C
The correct one-word substitution for the highlighted part of the sentence is (c) "granary."
Explanation:
Granary: A storehouse for threshed grain.
Hindi meaning: अन्नागार
Example: Farmers store their surplus grain in a granary.
Meanings of other options:
Apiary: A place where bees are kept.
Archive: A place where records or documents are kept.
Dormitory: A large bedroom for a number of people in a school or institution.