Concept:
Layakari (लयकारी) refers to the art of playing with rhythm and tempo to create complex fractional cross-rhythms against a steady pulse. These geometric ratios are defined mathematically as the number of notes compressed into a specific number of foundational beats:
• Tigun (तिगुन): Playing at triple speed. This means playing exactly 3 matras (notes) in the space of 1 foundational matra (Ratio $3:1$).
• Aad Aadi (आड़): Playing at a fractional ratio of $1.5$ times the base speed. This means fitting exactly 3 matras into the space of 2 foundational matras (Ratio $\frac{3}{2}$).
• Kuaad Kuaadi (कुआड़): Playing at a fractional ratio of $1.25$ times the base speed. This means fitting exactly 5 matras into the space of 4 foundational matras (Ratio $\frac{5}{4}$).
• Biaad Biaadi (बिआड़): Playing at a fractional ratio of $1.75$ times the base speed. This means fitting exactly 7 matras into the space of 4 foundational matras (Ratio $\frac{7}{4}$).
Step 1: Match each rhythmic term to its corresponding mathematical ratio description.
• A. Aadi $\rightarrow$ III. Three matra in two matra ($\frac{3}{2}$)
• B. Kuaadi $\rightarrow$ IV. Five matra in four matra ($\frac{5}{4}$)
• C. Biaadi $\rightarrow$ II. Seven matra in four matra ($\frac{7}{4}$)
• D. Tigun $\rightarrow$ I. Three matra in one matra ($3:1$)
This yields the sequence: A-III, B-IV, C-II, D-I. This matches option (C).