Chemistry Question from JEE Main 2023 · 11 April, Shift 1

A bicyclic alcohol — a cis-fused decalin (two fused cyclohexane rings) bearing a methyl group at one ring-fusion carbon and an $\mathrm{OH}$ group on the adjacent carbon — is treated with $\mathrm{HBr}$ to give the major product $'A'$.

The number of hyperconjugation structures involved to stabilize the carbocation formed in the above reaction is _____