Read the following passage carefully and answer the questions that follow. In a language laboratory, students were given an interesting puzzle involving the word ”ELECTROCARDIOGRAPH.” The teacher explained that such exercises not only test logical skills but also sharpen attention to detail. According to the challenge, the word had to undergo a series of transformations.

First, the class was asked to take the first half of the letters, reverse their order and make the arrangement of letters look quite different from the original. Next, the students were told to identify the last but one letter of the original word and place it at the very beginning, a step that changed the opening appearance of the sequence completely. Finally, as a finishing touch, they had to add the letter ’S’ at the end. Following these steps carefully would lead them to the correct transformed word, and only those who adhered to each condition in the exact order could solve the puzzle successfully. (150 words)

Name the letter sandwiched between two vowels?

The correct option is C and L.

Let us solve the puzzle step-by-step by following the instructions given in the passage.

Original Word: ELECTROCARDIOGRAPH

The total number of letters in "ELECTROCARDIOGRAPH" is 18.

Step 1: Take the first half of the letters and reverse their order.
The word has 18 letters, so the first half consists of the first 9 letters:
First half: E - L - E - C - T - R - O - C - A
Reversing this sequence gives: A - C - O - R - T - C - E - L - E
The second half remains unchanged: R - D - I - O - G - R - A - P - H
Sequence after Step 1: ACORTCELE RDIOGRAPH

Step 2: Identify the last but one letter of the original word and place it at the very beginning.
The original word is ELECTROCARDIOGRAPH.
The last letter is 'H', and the last but one (penultimate) letter is 'P'.
Placing 'P' at the very beginning of our sequence gives:
Sequence after Step 2: P A C O R T C E L E R D I O G R A P H

Step 3: Add the letter ’S’ at the end.
Adding 'S' at the very end gives the final transformed word:
P A C O R T C E L E R D I O G R A P H S

Step 4: Find the letters sandwiched between two vowels in the final sequence.
Let us identify the vowels (A, E, I, O, U) and look at the letters positioned between two vowels:
1. In the sequence A C O, the letter C is between the vowels 'A' and 'O'.
2. In the sequence E L E, the letter L is between the vowels 'E' and 'E'.

Thus, the letters sandwiched between two vowels are C and L.