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Which sentence is written correctly?
a. Taste buds can detect sweet sour salty and bitter.
b. Taste buds can detect sweet, sour, salty, and bitter.
c. Taste buds can detect, sweet, sour, salty and bitter.
d. Taste buds, can detect, sweet, sour, salty and bitter.
b. Taste buds can detect sweet, sour, salty, and bitter.