Correct Answer: 2, 4, 3, 5, 1

Solution : Given:
1. Plate 2. Plane 3. Plaster 4. Plasma 5. Plastic

Step 1: Compare the first letter of each word. Since all the words start with the same letter P , then move on to the next letter.
Step 2: The second and third letters of each word are the same, l , and a , then move on to the next letter.
Step 3: The fourth letter of each word is t , n , or s . Based on the alphabetical order of these letters, we can arrange them – Pla n e, Pla s ma, Pla s ter, Pla s tic, Pla t e.
Step 4: Compare the fifth letter of the word (Plas m a, Plas t er, Plas t ic). Plasma will come before Plaster and Plastic in the sequence as m comes before t in alphabetical order.
Step 5: Compare the sixth letter of the word (Plast e r, Plast i c). Plaster will come before Plastic in the sequence as e comes before i in alphabetical order.

So, the sequence is Plane, Plasma, Plaster, Plastic, Plate, or 2, 4, 3, 5, 1. Hence, the fourth option is correct.