diff --git a/unit7_ex7.2.3.py b/unit7_ex7.2.3.py
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+# exercise 7.2.3 from unit 7
+'''
+Here is a piece of code, but it is missing the arguments that are passed to the range function:
+
+for num in range(___, ___, ___):
+    print(number)
+Mark all the options where the values (start, stop, step) will give the following output:
+
+0
+-3
+-6
+-9
+'''
+
+# Answer: 
+# C: (0, -10, -3)
+# D: (0, -12, -3)