Step 1 : Introduction to the question "Ageusia is the loss of which one of the five sense?"
Ageusia is the loss of taste functions of the tongue, particularly the inability to detect sweetness, sourness, bitterness, and saltiness. This disorder can be triggered by many factors such as nerve damage or vitamin deficiency. Ageusia is sometimes confused with anosmia – a loss of the sense of smell. Because the tongue can only indicate texture and differentiate between sweet, sour, bitter, and salty, most of what is perceived as the sense of taste is actually derived from smell. True ageusia is relatively rare compared to hypogeusia – a partial loss of taste – and dysgeusia – a distortion or alteration of taste.