Select the most appropriate option to fill in the blank.
A _________ is a female horse.

Correct option is C

The correct option to fill in the blank is (c) Mare.
Explanation:
"Mare" specifically refers to an adult female horse. It is the most accurate zoological term for the blank.
(Hindi: घोड़ी)

Example: The mare won the first prize in the horse race.

Why other options are incorrect:
· (a) Vixen: Female fox (Hindi: लोमड़ी)
· (b) Doe: Female deer (Hindi: हरिणी)
· (d) Rooster: Male chicken (Hindi: मुर्गा)