Only animal which has horns in forehead both gender?

The statement that only one animal has horns in the forehead in both genders is not entirely accurate. There are several animals where both males and females have horns.

Here are a few examples:

* Bovine species: Cows, bulls, and other members of the Bovidae family (like bison, buffalo, and yak) have horns in both males and females.

* Antelopes: Most antelope species have horns in both males and females, though they may differ in size and shape.

* Giraffes: Both male and female giraffes have horns (called ossicones), but they are much smaller and less prominent in females.

* Pronghorns: This North American antelope species is unique in that both males and females have horns, which are forked and are shed and regrown annually.

It's important to note that the size, shape, and purpose of horns can vary significantly between males and females within a species. In some cases, horns are used for defense, competition for mates, or even display.