Adverbials can be placed in different positions within clause, but specific negative or restrictive adverbs trigger mandatory subject-auxiliary inversion when placed at the beginning of a sentence for emphatic purposes. Analyze the following statements regarding the syntax of adverbials:

I. "Seldom have I seen such a remarkable display of talent" is a grammatically correct example of inversion triggered by a negative adverb.
II. "Hardly had he arrived when the phone rang" demonstrates the correct use of inversion with a time-relationship adverbial.
III. "Little she knows about the surprise" is the correct emphatic form of the sentence "She knows little about the surprise".

It is correct what is stated