Most common constituents of organic compounds found in organims are 

Carbon is the essential element in all organic compounds.

Carbohydrates (sugars), proteins (pulses), fats (edible plant and animal oil) and vitamins are the major classes of organic compounds often used in our daily diet.

The majority of organic compounds are composed of a relatively small number of elements. The most important ones are: carbon, hydrogen, oxygen, nitrogen, sulphur, halogen, phosphorus. Elementary qualitative analysis is concerned with...

The main component in plant cell walls is a compound known as cellulose. The cellulose is a structural compound, mainly carbohydrate, that is largely responsible for structure of the plant cells....

A) Both a and b are true

B) Berzelius

Correct option is  B) addition

C) Hydrogen, oxygen

Saliva contains 98% water and 2% other constituents like electrolytes (sodium, potassium, calcium, chloride, bicarbonates), digestive enzyme, salivary amylase and lysozyme.

Pancreatic juice secreted by pancreas contains pancreatic amylases, lipases and inactive enzymes trypsinogen and chymotrypsinogen. Pancreatic juice also contains nucleases- the enzymes that digest nucleic acids.