The organic reaction represented by equation CH3 – CH = O + H2NOH gives CH3 – CH – NH + H2O is an example of A. an addition reaction B. a condensation reaction C. an oxidation reaction D. an elimination reaction

The correct answer is B. a condensation reaction.

In a condensation reaction, two molecules are joined together to form a larger molecule, with the loss of a small molecule such as water. In the reaction given in the question, two molecules are joined together to form a larger molecule, with the loss of water. This is an example of a condensation reaction.

An addition reaction is a reaction in which two or more molecules combine to form a larger molecule without the loss of any small molecules. An oxidation reaction is a reaction in which a substance loses electrons or is oxidized. An elimination reaction is a reaction in which a molecule loses a small molecule, such as water, to form two smaller molecules.