Which of the following is a correct pair of masculine and feminine gender?

Stag:Hind

The correct pair of masculine and feminine gender is Stag:Hind.

• Viceroy:Viceroy is not a correct pair because both words are masculine.
• Fox:She Fox is not a correct pair because the feminine form of fox is vixen.
• Horse:Stallion is not a correct pair because stallion is a specific type of horse, not a gender.

The feminine form of stag is hind. A hind is a female deer, while a stag is a male deer. So, the pair stag:hind is a correct pair of masculine and feminine gender.