For a long time only four tastes were recognised: sweet, salty, bitter and:
ASour
BSoapy
CSmoky
DSpicy
Answer & Solution
Correct answer: A. Sour
1. Three of the four are named.
2. Lemon juice gives the fourth.
3. That taste is sour.
_Source: OpenStax Anatomy and Physiology 2e, Chapter 14, Special Senses._
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