Statement I: Incorrect. Ektala has 12 beats and 6 divisions (Vibhags), not 4. The structure is 2+2+2+2+2+2.
Statement II: Correct. Teentala is the most prevalent tala in Hindustani music for tabla solos and accompaniment.
It consists of 16 beats divided into 4 sections and is a standard tala for Khayal, instrumental music, and dance.
Therefore, only Statement II is accurate.