-  
Since a letter is 12th from right end and 5th from left end then, the total number of letters will be 16.

Let's start by understanding the given information:

The letter is 5th from the left end: This means that there are 4 letters to the left of the given letter.

The letter is 12th from the right end: This means that there are 11 letters to the right of the given letter.

Now, let's assume that the total number of letters in the row is 'n'. This means that:

The position of the given letter from the left end = 5

The position of the given letter from the right end = 12

The total number of letters in the row = n

We can use the following formula to find the position of the same letter from both the ends:

Position from the right end = (Total number of positions + 1) - Position from the left end

Using this formula, we can write two equations based on the given information:

• n - 4 = 12 + 1
• n = 5 + 11 + 1

Simplifying these equations, we get:

• n - 4 = 13

n = 17

• n = 17

Thus, we can see that the total number of letters in the row is 17, and the given letter is the 5th letter from the left end and the 12th letter from the right end. Therefore, the correct answer is Option B, i.e., 16.

If you think the solution is wrong then please provide your own solution below in the comments section .