Given a short query with keyphrases about a research idea in 2018 in the domain of artificial intelligence, recommend the relevant datasets to validate the research idea from options provided. A short description of the datasets is also provided to help you.

Query: I want to find images with similar visual content to a query image.

Keyphrases: landmark recognition images

Dataset description:
COVERAGE: COVERAGE contains copymove forged (CMFD) images and their originals with similar but genuine objects (SGOs). COVERAGE is designed to highlight and address tamper detection ambiguity of popular methods, caused by self-similarity within natural images.
Oxford5k: Oxford5K is the Oxford Buildings Dataset, which contains 5062 images collected from Flickr. It offers a set of 55 queries for 11 landmark buildings, five for each landmark.
ImageNet-Sketch: ImageNet-Sketch data set consists of 50000 images, 50 images for each of the 1000 ImageNet classes. The data set is constructed with Google Image queries "sketch of ", where  is the standard class name.
SNIPS: The SNIPS Natural Language Understanding benchmark is a dataset of over 16,000 crowdsourced queries distributed among 7 user intents of various complexity:   SearchCreativeWork (e.g. Find me the I, Robot television show), GetWeather (e.g.

Options:- A: COVERAGE  B: Oxford5k  C: ImageNet-Sketch  D: SNIPS
Oxford5k