step by step w explanation please

Which of the following IR spectra best match the expected product of the following reaction? TH1 NaBH CN o 100 10 % Transmittance no 40 20 4000 3500 3000 2500 2000 1500 1000 Wavenumber (cm) 100 80 % Transmittance 88 20 0 4000 3500 3000 2500 2000 Wavenuumhart-1 1500 1000 Which of the following IR spectra best match the expected product of the following reaction? TH1 NaBH CN o 100 10 % Transmittance no 40 20 4000 3500 3000 2500 2000 1500 1000 Wavenumber (cm) 100 80 % Transmittance 88 20 0 4000 3500 3000 2500 2000 Wavenuumhart-1 1500 1000