Carbonyl compound which contains `alpha-H` gives aldol condenation reaction in presence of alkaline medium. The reaction between two molecules of acetaldehyde take placeas follows in presence of base
Product
A. `Ph-CH=CH-(CH_(2))_(5)-CHO`
B. `Ph-(CH_(2))_(5)-CH=CH-CHO`
C. `Ph-CH=underset(CHO)underset(|)(C)H-(CH_(2))_(4)-CHO`
D. `Ph-CH=underset(CHO)underset(|)(C)H-(CH_(2))_(4)-CH_(3)`