Organic Compounds Containing Oxygen: JEE Main 2026 Chemistry question

Given below are the four isomeric compounds (P, Q, R, S): P: $\mathrm{C_6H_5CH(OH)CH{=}CH_2}$, Q: $\mathrm{C_6H_5CH_2CH_2CHO}$, R: $\mathrm{C_6H_5CH_2COCH_3}$, S: $\mathrm{C_6H_5COCH_2CH_3}$ (structures as drawn). Identify correct statements from below. A. Q, R and S will give precipitate with 2, 4 – DNP. B. P and Q will give positive Bayer's test. C. Q and R will give sooty flame. D. R and S will give yellow precipitate with $\mathrm{I_2}$ / NaOH. E. Q alone will deposit silver with Tollen's reagent. Choose the correct option.