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

Solution : Given:
1. Custom  2. Creep  3. Cradle  4. Congrats  5. Couple

Step 1: Compare the first letter of each word. Since all the words start with the same letter C , move to the next letter.
Step 2: Compare the second letter of (C u stom, C r eep, C r adle, C o ngrats, C o uple). The order is (Congrats, Couple), (Creep, Cradle), and Custom.
Step 3: Compare the third letter of (Co n grats, Co u ple) and (Cr e ep, Cr a dle). The order is Congrats, Couple, Cradle, Creep.

So, the sequence is Congrats, Couple, Cradle, Creep, Custom, or 4, 5, 3, 2, 1. Hence, the first option is correct.