Choose the organic compound from the list given below to answer the following questions:

Choose the organic compound from the list given below to answer the following questions:

$\boxed{\text{Ethene, Ethanoic acid, Ethanol, Methanal}}$

(a) The compound which does not have a double bond in its structure.

(b) The compound which in its pure form turns into an ice like solid on cooling.

(c) The compound which is used for artificial ripening of fruits.