The correct option is (B) Turmeric and Litmus
Indicators are the substances that are used to identify whether the given substance is an acid or a base.
There are two types of indicators:
(i) Natural: These indicators are obtained from natural sources like plants.
- Turmeric, litmus, china rose petals, etc., are some of the naturally occurring indicators.
- The most commonly used natural indicator is litmus.
- It is extracted from lichens.
- It is available in the form of a solution, or in the form of strips of paper, known as litmus paper.
- Generally, it is available as red and blue litmus paper.
(ii) Man-made: Phenolphthalein, Methyl orange are some of the man-made indicators.
