Litmus solution is derived from ______________

Correct option is C

​The correct answer is (C) Lichen.

• Litmus solution is derived from lichens, specifically from the species Roccella tinctoria.
• The litmus solution serves as a pH indicator, changing color when exposed to different pH levels. It turns red in acidic environments and blue in alkaline conditions.

Information about other options:

• Hydrangea: While the hydrangea plant's flowers can change color depending on soil pH, it is not used to make litmus solution.
• Petunia: Petunias are flowering plants, but they do not produce a pH indicator like litmus.
• Cabbage leaves: Red cabbage contains anthocyanin, a pigment that can also act as a pH indicator, but it is not used to make litmus solution.

Information Booster:

• Lichens: Lichens are important bioindicators of air quality. They are capable of surviving in harsh environments and are commonly found in rocky, mountainous regions.
• Litmus: The use of litmus as an indicator dates back to the 14th century and is still widely used in chemistry and biology labs to test for acidic or alkaline conditions.