Answer is: C) pear fragrances.
Chemical reaction: CH₃(CH₂)₄OH + CH₃COOH ⇄ CH₃COO(CH₂)₄CH₃ + H₂O:
CH₃(CH₂)₄OH is 1-pentanol.
CH₃COOH is acetic acid.
CH₃COO(CH₂)₄CH₃ is amyl acetate or pentyl acetate.
H₂O is molecule of water.
Pentyl acetate is used as a flavoring agent, as a paint and lacquer solvent.