China Rose is which Type of Indicator

Answer: (3) Natural indicator.

The petals of Hibiscus rosa-sinensis (China roses) act as a natural indicator.

Soak some China rose petals in warm water for a few hours. The red-coloured solution can now be used as an indication to determine whether a solution is acidic or basic. In an acidic solution, it turns magenta, and in a basic solution, it turns green.