An alkene obtained by the dehydration of an alcohol (A), on ozolysis gives two molecules of acetaldegyde for ever molecule of alkene. The alcohol (A) is
A. `CH_(3)CH_(2)CH_(2)OH`
B. `CH_(3)CH_(2)OH`
C. `CH_(3)CH=CHCH_(2)OH`
D. `CH_(3)CH_(2)underset(OH)underset(|)(CHCH_(3)`