Update app.py

app.py

@@ -1279,7 +1279,7 @@ with gr.Blocks() as interface:
     with gr.Row():
         with gr.Column():
             subject_dropdown = gr.Dropdown(
-                choices=list(SUBJECT_SUBTOPICS.keys()),  # Use dictionary keys
+                choices=[""]+list(SUBJECT_SUBTOPICS.keys()),  # Use dictionary keys
                 label="Select Mathematics Subject",
                 info="Choose a subject for the question"
             )
@@ -1314,7 +1314,7 @@ with gr.Blocks() as interface:
                 value="computation"
             )
             
-            # Add the new enhancement checkbox
+            # enhancement checkbox
             use_enhancement = gr.Radio(
                 choices=["yes", "no"],
                 label="Enhance with Textbook Material if Real Analysis",