If the letters of the word ACCELERATIONS are arranged in the alphabetical order, then which of the following letters will be in the centre of that arrangement?

The given word: ACCELERATIONS
Letters in alphabetical order: A A C C E E I L N O R S T​

Since there are 13 letters in total, the middle letter will be the 7th letter in this ordered sequence.​

So, the middle letter after arrangement alphabetical word is I

Thus, the correct option is: (c) I