Which of the following is a basic dye?

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(C) Basic dyes are synthetic dyes that contain basic groups like $-NH_2$ or $-NHR$ in their structure. $Methylene \ blue$ is a well-known cationic (ba

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Methylene blue

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(C) Basic dyes are synthetic dyes that contain basic groups like $-NH_2$ or $-NHR$ in their structure. $Methylene \ blue$ is a well-known cationic (basic) dye used in biological staining and textile dyeing. $Congo \ red$ is an acidic dye,while $Aniline \ yellow$ is a solvent dye and $Phenolphthalein$ is an acid-base indicator.

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