Which of the following characters/letters is NOT classified as a dental ($\text{दन्त्य}$) consonant?

Let's check the phonetic classification of these letters based on their place of articulation:
* The complete त-वर्ग (consisting of त, थ, द, ध, न) are dental consonants ($\text{दन्त्य}$), produced by touching the tongue tip to the upper teeth.
* The letter ट belongs to the ट-वर्ग (ट, ठ, ड, ढ, ण), which are retroflex consonants ($\text{मूर्धन्य}$), produced by curling the tongue back against the roof of the mouth.

Hence, ट is not dental.