Which of the following are novels of Irvine welsh?
[A] The acid house
[B] Trainspotting
[C] Beside the ocean of time
[D] Filth
[E] Maris Belfrage
Choose the correct answer from the options given below:

The correct answer is A, B and D only.

To understand why this option is correct, let's examine each of the literary works listed in the question:
[A] The Acid House: Published in 1994, this is a celebrated collection of short stories and a novella written by the Scottish novelist Irvine Welsh. It showcases his signature dark humor, Scottish dialect, and gritty themes.
[B] Trainspotting: Published in 1993, this is Irvine Welsh's highly acclaimed debut novel. It follows a group of heroin users in Edinburgh and remains his most famous work, later adapted into an iconic film.
[D] Filth: Published in 1998, this is a dark, satirical novel by Irvine Welsh that centers on a corrupt, misanthropic Edinburgh police officer.

On the other hand, the remaining options are written by other authors:
[C] Beside the ocean of time: This is a 1994 novel written by the Scottish poet and novelist George Mackay Brown, which was shortlisted for the Booker Prize.
[E] Maris Belfrage: This is a collection of short stories published in 1986 by George Mackay Brown, not Irvine Welsh.

Therefore, only [A], [B], and [D] are works written by Irvine Welsh, making "A, B and D only" the correct choice.