Identify the errors in the given sentence and choose the sentence that rectifies these errors.
"I visited mall yesterday. It had unique designer shop of accessories."

Correct option is C

The correct answer is option (c): "I visited a mall yesterday. It had a unique designer shop of accessories." The sentence in its given form has two major errors related to articles:
1. "I visited mall yesterday." → The noun "mall" is a singular countable noun, which means it requires an article before it. The correct phrase should be "I visited a mall yesterday."
2. "It had unique designer shop of accessories." → The noun "shop" is also singular and countable, so it needs an article before it. The correct phrase should be "a unique designer shop of accessories."
Additionally, an important grammatical rule applies to the usage of "a" and "an" before words beginning with vowels. Although "unique" starts with the letter "u", it is pronounced as /juː/ (yoo-neek), which starts with a consonant sound. Hence, "a" is the correct article instead of "an."
The incorrect option (a) uses "an unique," which is grammatically incorrect due to the pronunciation of "unique." Similarly, option (b) is wrong because it omits the article before "designer shop." Option (d) is also incorrect as it lacks an article before "mall."
Thus, option (c) is the most grammatically correct sentence. The corrected sentence now reads fluently and adheres to standard English grammar rules regarding the use of articles.