Which of the following IR spectra best match the expected product of the following reaction?OHto1) Excess CH,MgBrCH3CH3OMe2) H2O10080200-4000350030002500200015001000Wavenumber (cm)1008060400.400035003000250020001500Wavenumber (cm)100010080-604020-0.4000350030002500200015001000Wavenumber cm% Transmittance% Transmittance% Transmittance20 Wavenumber (cm)10080600.1500100040003500300025002000Wavenumber (cm)1008060-40-20-0.4000350030002500200015001000Wavenumber (cm)10080600.4000350030002500200015001000Wavenumber (cm)40204020% Transmittance% Transmittance% Transmittance

When aliphatic ester compound is treated with excess of MeMgBr followed by acidification then aliphatic tertiary alcohol should form. Details mechanism are shown in image.As it is an aliphatic alcohol, the following IR peaks should have : A. Broad peak at 3300-3600 cm^-1 corresponding to the O-H stretching vibration for C-OH group should be obtained. B. Medium peak at 2980 and 2870 cm^-1 corresponding to the C-H stretching vibration of CH3 and CH2 groups should be obtained. C. Medium peak at 1465 cm^-1 corresponding to the C-H bending vibration of CH2 group. D. Strong peak at 1050 cm^-1 corresponding to the C-O stretching vibration. N.B. no peak at 3000-3050, 1600-1650 and 1670-1750 cm^-1 should be obtained. All these peaks are properly matches with the IR of compound C. Hence the correct option is : C.