Which of the following statements are correct? (Use pKa values: 4-nitrophenol 7.15, 3-nitrophenol 8.35, phenol 10.0, 2,4,6-trinitrophenol 0.4, carbonic acid pKa1 6.4.)

1. A4-Nitrophenol is a stronger acid than 3-nitrophenol because -M effect operates in the para isomer in addition to -I effect.
2. B2,4,6-Trinitrophenol is more than $10^9$ times as strong an acid as phenol.
3. CCyclohexanol is a stronger acid than phenol because the alkyl ring donates electrons to oxygen.
4. DPhenol dissolves in aqueous NaOH but not to a significant extent in aqueous $\mathrm{NaHCO}{}_3$.