Step 1: Understanding Basmati rice.
Basmati rice is a special variety of long-grain aromatic rice traditionally grown in India. It is well-known for its fragrance, flavor, and cooking quality.
Step 2: Fact about varieties.
In India, 27 varieties of Basmati rice have been officially notified and approved for cultivation. This includes both traditional and improved varieties developed through breeding.
Step 3: Conclusion.
Thus, the correct answer is 27 varieties.