An organic compound X gives a red precipitate on heating with Fehling's solution. Which one of following reactions yields X as major product ?

Options

A. `HCHO underset((ii) H_2 O ) overset((i) CH_3 MgI)to`
B. `C_2 H_5 Br +AgOH overset(Delta)to`
C. `2C_2 H_5 Br +Ag_2O overset(Delta ) to `
D. `C_2 H_2 +H_2 O underset( 1% Hg SO_4 , 60^@ C) overset(40% H_2 SO_4)to`

Answer

D