diff --git a/SurveyLib.Core/Services/IAnswerVariantsService.cs b/SurveyLib.Core/Services/IAnswerVariantsService.cs
new file mode 100644
index 0000000..65cae57
--- /dev/null
+++ b/SurveyLib.Core/Services/IAnswerVariantsService.cs
@@ -0,0 +1,12 @@
+using SurveyLib.Core.Models;
+
+namespace SurveyLib.Core.Services;
+
+public interface IAnswerVariantsService
+{
+    Task AddAnswerVariantAsync(AnswerVariant answerVariant);
+    Task UpdateAnswerVariantAsync(AnswerVariant answerVariant);
+    Task DeleteAnswerVariantAsync(int id);
+    Task<AnswerVariant> GetAnswerVariantByIdAsync(int id);
+    Task<IEnumerable<AnswerVariant>> GetAnswerVariantsByQuestionIdAsync(int questionId);
+}
\ No newline at end of file