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The figure given below shows the alimentary canal of cockroach with few structures labelled as 1, 2, 3 and 4. Identify the correct identification of the structure which is also called proventriculus and helps in grinding the food particles.

A. 1

B. 2

C. 3

D. 4

Please do not use chat terms. Example: avoid using "grt" instead of "great".

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