So in infrared spectroscopy, stronger the bond between two atoms higher will be the frequency, so a stronger bond leads to, ah, higher frequency. Also, if the similar type off born between two atoms is considered in different compounds which have different substitutes attached onto it due to the change in Elektronik environment off the bond both off the bonds will show different frequency. So even if the bonds are similar on to a different compound, then the frequency off each born will be different. So among the given three compounds in a city chlorine, the highly electro negative chlorine atom Let me go the structure first for us it'll chlorine succeed in double bond We have CS three and chlorine. So chlorine is highly electric. Negative. Yeah, So in acetic chlorine, the highly electro negative chlorine atom attached to the carbon I group is more electron withdrawing because off its inductive effect. Hence it's stretching. Frequency is higher. This is the bond. While in metal acetate, let me draw the structure first. In Matthias City we have oxygen double bond. We have carbon oxygen, long pair bonds along with oxygen. Yeah, in my tie, a sedate the electron negative oxygen atom attached directly to the carbon. I'll group will increase the stretching frequency because off inductive effect, but simultaneously, it also lowers the stretching frequency through its resonance effect. So the resonating structures this resonance effect provides electrons toe carbon. I'll group in one resonance from there is a double bond between carbon I'll Carbonell carbon on oxygen, while in another resonance structure, there is single bond character between carbon and oxygen. Therefore, the net bond order between carbon between carbon and oxygen is 1.5. As the resonance effect is more pronounced than inductive effect, the compound shows comparatively lower stretching frequency. Next we have in as it might let me go. The structure double bond oxygen on the resonant structure, his double or negative in a sodomite. The nitrogen atom attached to the carbon I group shows the resonance effect on there was a double bond. The resonance effect. Andi, increase the electron density on carbon atoms off the carbonite group. Hence it lowers the stretching frequency off the carbonite group, thus stretching vibration for carbonite group in acetate, chlorine is at the highest frequency. There you go in option B because off the presence off inductive effect off chloral group in a subtle chloride back toe. Acetyl chloride is this. It'll cool, right? Because of the inductive effect between carbon oxygen between carbon chlorine. The stretching vibration for carbonite group is at the highest frequency. Both Matthias it eight on a seat. Um, I'd shows the resonance effect. But besides off Miss America effect oxygen and nitrogen shows the inductive effect on carbonite group hearing oxygen inductive effect is much more compared much, much more compared with nitrogen inductive effect in a might. Therefore, the stretching vibration off carbonite group off Sita might is that lower frequency compared toa Esther groups?