http://i63.tinypic.com/1fbv6h.jpg -- Question 4 why is the answer (a)..?

4.
A. true
CH₂=CH₂ + H₂O → CH₃-CH₂OH (acid catalysed)

B. false
Ethanol is a saturated compound because it does not contain double bond or triple bond.

C. false
Ethanol is formed by reduction of ethanoic acid.
CH₃-COOH + 4[H] → CH₃-CH₂OH + H₂O
Ethanoic acid is formed by the oxidation of ethanol.
CH₃-CH₂OH + 2[O] → CH₃-COOH + H₂O

D. false
Ethanol reacts with an acid (ethanoic acid) to form ethyl ethanoate

...... Answer : A. It is formed by the catalytic addition of steam to ethene.