Correct option is D
The correct answer is (d).
Explanation
The tongue helps in detecting different tastes with the help of taste buds present on its surface. It also helps in mixing food with saliva and swallowing. However, it does not secrete saliva or convert sugar into starch.
Additional Information
• Option {a} is incorrect because saliva is secreted by salivary glands, not the tongue. • Option {b} is incorrect because conversion of sugar into starch does not occur in digestion. • Option {c} is incorrect because both mentioned functions are not performed by the tongue.