Rose petals turn from red to blue in ______?

گلاب کی پنکھڑیوں ______ میں سرخ سے نیلے رنگ کی طرف موڑ جاتی ہے؟

Neutral solution

Acidic solution

Alkaline solution

None of these

Rose petals act as a natural pH indicator.

They turn blue in alkaline (basic) solutions due to pigment changes.