To address this, examine the number of Vibhags (divisions) within each Tala:
Teentala: Consists of 16 beats, structured into 4 Vibhags, each containing 4 beats. This results in 4 divisions.
Ektala: Features 12 beats, but is divided into 6 Vibhags (2+2+2+2+2+2), hence possessing more divisions than Teentala.
Sooltala: Comprises 10 beats with 5 Vibhags (2+2+2+2+2).
Tevra: Has 7 beats divided into 3 Vibhags (3+2+2).
Therefore, in ascending order of Vibhags: Tevra (3) → Teentala (4) → Sooltala (5) → Ektala (6).
Consequently, the correct sequence is (a) Teentala, (b) Ektala, (c) Sooltala, (d) Tevra.