The Vernacular Press Act was not enacted under Lord Curzon, but instead it was Lord Lytton, making option 3 the correct answer.

To further clarify, let`s go through all the options:

In option 1, Pitt’s India Act was indeed associated with Warren Hastings. The act came into force during his time as Governor General and it involved governance reformation for the East India Company.

In option 2, the Doctrine of Lapse was a policy implemented by Dalhousie, which stated that a princely state or territory would automatically be annexed if the ruler was either "manifestly incompetent or died without a male heir".

In option 4, the Ilbert Bill controversy happened during Ripon`s time. The bill proposed to allow Indian judges to trial British offenders, which was a significant step towards equality in the judiciary.

So, it is only option 3 that is incorrectly matched, worthy of our initial identification.