The correct option is D A
We have to determine the letter that can be divided into two symmetrical halves.
∙ If two halves of the letter are mirror halves of each other, then the shape of the letter is divided into symmetrical halves. If not, then it is not symmetrical.
∙ Letter Z is not symmetrical about the given line. If we write the letter Z on a piece of paper and fold it along the line, then both halves will not be mirror halves. It cannot be divided into symmetrical halves.
∙ Letter S is not symmetrical about the given line. If we write the letter S on a piece of paper and fold it along the line, then both halves will not be mirror halves. It cannot be divided into symmetrical halves.
∙ Letter R is not symmetrical about the given line. If we write the letter R on a piece of paper and fold it along the line, then both halves will not be mirror halves. It cannot be divided into symmetrical halves.
∙ Letter A is symmetrical about the given line. If we write the letter A on a piece of paper and fold it along the line, then both halves will be mirror halves. It can be divided into symmetrical halves.
Hence, D is the correct option.