Here in question it is asked which of the halides does not readily hydrolysed by water. We can clearly say that carbon halides, $ C{X_4} $ cannot undergo hydrolysis due to non-availability of d-orbitals since carbon cannot extend its coordination number beyond four.

Which one of the following halides does not undergo Hydrolyse?

NF3 does not undergo hydrolysis due to absence of vacant d-orbitals.

Which halide does not Hydrolyse at room temp?

SiCl4​