Complete the following sentence by choosing the appropriate option:
Digestive juice in cockroach is secreted by a ring of blind tubules which are ______ in number.
1. 100-150
2. 9-10
3. 6-8
4. 15-20

Which among the following statements are incorrect with respect to cockroach ?

Which among the following is differentiated into ileum, colon and rectum ?
1. Caecum
2. Foregut
3. Midgut
4. Hindgut

Pharynx of cockroach is
1. Short, tubular
2. Opens to crop
3. Mouth leads to pharynx
4. All the above

Find the incorrect match.