Correct Answer: 3, 2, 1, 5, 4

Solution : Given:
1. Ambitions 2. Ambiguous 3. Ambiguity 4. Animation 5. Animal

Step 1: Compare the first, letter of each word. Since all the words started with the same letter A , move on to the next letter.
Step 2: The second letter of each word is either m or n . Based on the alphabetical order of these letters, we can arrange them – A m bitions, A m biguous, A m biguity, A n imation, A n imal.
Step 3: Compare the fifth letter of (Ambi t ions, Ambi g uous, Ambi g uity). Ambiguous, and Ambiguity will come before Ambitions in the sequence as g comes before t in the alphabetical system.
Step 4: Compare the seventh letter of (Ambigu o us, Ambigu i ty). Ambiguity will come before Ambiguous in the sequence as i comes before o in the alphabetical system.
Step 5: Compare the sixth letter of (Anima t ion, Anima l ). Animal will come before Animation in the sequence as l comes before t in the alphabetical system.

So, the sequence is Ambiguity, Ambiguous, Ambitions, Animal, Animation, or 3, 2, 1, 5, 4. Hence, the third option is correct.