'Aparsthaysanchar' indicates:

Correct option is D

Correct Option: d)
Aparsthaysanchar is an advanced vocal technique in Hindustani classical music, particularly associated with the Dhrupad genre.
Information Booster:
· Aparsthaysanchar indicates the Quality of the singer, specifically their virtuosity and technical prowess.
· It is a test of the performer's lung capacity (breath control), clarity of enunciation (layakari), and the ability to execute complex, rapid sequences (taans or bol-baant) seamlessly and without strain.
· A mastery of Aparsthaysanchar is a hallmark of a highly trained and accomplished classical vocalist.
Additional Knowledge:
· Sthai and Antra: These are the structural parts of a composition, not a technique.
· Echo: Refers to an acoustic effect or a musical device of repetition, not this specific advanced vocal skill.
· Deshi Sangeet: Refers to regional or folk music, a genre classification, not a vocal technique.