Identify the oxymoron.
B
Explanation:
“Oxymoron” is a figure of speech in which two opposite ideas are joined to create an effect. In option 1 with “original” is contradictory to “copy” which means ‘an imitation of an original. In option 2 with “small” is contradictory to “crowd” meaning ‘large number of people collected together’. In option 3 “open” is contradictory to “secret” which means ‘some information kept concealed’. Hence, the correct answer is option 4.