Correct Answer: 1, 2, 5, 4, 3

Solution : Given:
1. Zeal 2. Zebra 3. Zygote 4. Zinc 5. Zest

Step 1: Compare the first letter of each word. Since all the words start with the same letter Z , then move on to the next letter.
Step 2: The second letter of each word is e , i , or y . Based on the alphabetical order of these letters, we can arrange them – Z e al, Z e bra, Z e st, Z i nc, Z y gote.
Step 3: Compare the third letter of (Ze a l, Ze b ra, Ze s t). Zeal will come before Zebra and Zest as a comes as b and s in the alphabetical system. Similarly, Zebra will come before Zest as b comes before s in the alphabetical system.

So, the sequence is Zeal, Zebra, Zest, Zinc, Zygote, or 1, 2, 5, 4, 3. Hence, option second is correct.