In which of the following, the shape of the tongue resembles a fresh curled leaf while performing it?

The correct option is Sitali.

Sitali (also known as Sheetali) is a well-known pranayama (breathing technique) in yoga. The word "Sitali" is derived from the Sanskrit root "Sheet", which means cold or cooling. This practice is specifically designed to cool the body and mind.

To perform Sitali pranayama, the practitioner extends the tongue out of the mouth and rolls or curls the outer edges inward from both sides to form a tube-like shape. This folded shape of the tongue closely resembles a fresh, curled leaf or a straw. The practitioner then inhales deeply through this rolled tongue, allowing the air to cool as it passes over the moist surface of the tongue before entering the lungs.

Therefore, Sitali is the pranayama in which the shape of the tongue resembles a fresh curled leaf during execution.