Major product of the reaction of m-hydroxyphenol in boiling aq NaHCO3
The major product (proportions dependent on conditions) is option 2 (beta-resorcylic acid) according to these papers$\ce{^{[1]} ^{[2]}}$. The relatively low proportion of option 1 (gamma-resorcylic acid) is attributed to steric hindrance$\ce{^{[3]}}$.



References


The carboxylation of resorcinol and the separation of β-and γ-resorcylic acid by ion-exchange chromatography by
D. K. Hale,  Audrey R. Hawdon, J. Idris Jones  and  D. I. Packham. DOI: https://pubs.rsc.org/en/content/articlelanding/1952/JR/JR9520003503#!divCitation
The chemistry of resorcinol carboxylation and its possible application to the CO2 removal from exhaust gases by Vincenzo Barbarossa, Francesco Barzagli, Fabrizio Mani, Sarah LaicGiuseppina Vangaa
DOI:https://doi.org/10.1016/j.jcou.2015.04.004 (picture source)
https://www.studocu.com/en-us/document/university-of-north-carolina-at-charlotte/organic-chemistry-2/assignments/lab-report-4-carboxylation-of-resorcinol/2141490/view