Explanation:

Let's see how the words appear in dictionary order:

- Umbilical

- Umbrella

- Unaltered

- Unanimous

- Urgent

Step-by-step reasoning:

- Words starting with "Um" come before "Un" and "Ur."

- Between "Umbilical" and "Umbrella", "Umbilical" comes first (because "i" comes before "r").

- After the "Um" words, we look at "Unaltered" and "Unanimous"; "Unaltered" comes before "Unanimous" ("a" before "a", "l" before "n").

- Finally, "Urgent" comes last as "Ur" is after "Um" and "Un".

So, correct order is:

1. Umbilical

2. Umbrella

3. Unaltered

4. Unanimous

5. Urgent

Now check the options:

- Option 1: 1, 4, 3, 5, 2 ( This matches the correct order above)

- Option 2: 4, 1, 3, 5, 2 (Starts with Umbrella, but Umbilical should come first)

- Option 3: 1, 4, 2, 3, 5 (List and order incorrect)

- Option 4: 4, 1, 5, 3, 2 (Order incorrect)