The option is D.
Which all of the above sequences list nodes in the order in which we could have encountered them in the search?
The question goes like this. IF there had been $\mathbf{273}$ in the actual sequence then which of the following search sequences would have been successful.
In sequence $1$ no need to go from $285$ to $376$ as $273$ is less than $285$.
In sequence $2$ no need to go from $381$ to $472$ as $273$ is less than $381$.
In sequence $4$ no need to go from $395$ to $463$ as $273$ is less than $395$.
In sequence $3$ number $273$ might have been to the left of $307$ and search would have been successful.
Hence, Option D