Answer-A solution turns blue litmus red, its PH is likely to be?

Litmus paper is used as an indicator of acids or bases. There are two types of litmus papers present blue and red. A blue litmus paper when dipped in acid turns red in color and remains blue in basic medium. However, a red litmus paper when dipped in a base turns blue in color and remains red in acidic medium solution. Hence, it can be determined whether a solution is acidic or basic with the use of litmus paper. Hence, option A is correct.