The statement, "During most of the Soviet rule (and certainly after 1934), any form of experimental art was considered dissident and, therefore, could only exist as a part of underground culture" is True
Option a
Explanation:
All across the 1920s, the creation of Soviet Art was followed by an era of severe ideological competitiveness among artistic groups, which each tried to ensure that their views were given a priority for the determination of the shapes and instructions under which soviet art will also grow.
The increasing crisis of radical left wing artwork done this fight even more angry, In the late 1930's, several avant-garde movements that emerged in the 1910s had become tired and began depicting artifacts in real life, as they sought to return to the traditional model of drawn pictures.