The piece of wood used to beat Nagada is

The correct answer is B. Chob.

A chob is a piece of wood used to beat a nagada, a type of Indian drum. It is typically made of hardwood, such as teak or rosewood, and is about 12 inches long and 2 inches in diameter. The chob is held in one hand and used to strike the nagada in a rhythmic pattern. The sound of the nagada is produced by the vibration of the drumhead, which is made of animal skin. The chob helps to control the pitch and volume of the sound.

The other options are incorrect. Thil is a type of Indian drumstick, while dandi is a type of Indian staff. Tasha is a type of Indian cymbal.