Mention the constituent of food if the end result of the test shows :

1. White to yellow and yellow to orange colour.
2. Turning blue-black after adding iodine solution.
3. Blue green to deep red with appearance of precipitate.
4. Ash that does not burn after continued heating.

Pylorous is an opening from

1. oesophagus into stomach
2. mouth cavity into oesophagus
3. stomach into intestine
4. intestine into rectum

The water from the digested food is mainly absorbed by

1. stomach
2. duodenum
3. colon
4. rectum

Which one of the following pairs of types of teeth perform one common function as stated against it?

1. Incisors, canines — Holding
2. Canines, premolars — Tearing
3. Premolars, molars — Grinding
4. Molars, incisors — Tearing