Question

have you bought some mangoes in error spot​

Answer 1

THE is the definite article. It signifies specific items. It is also used before words that have been mentioned previously in a given context. A is generally used before singular nouns which begin with a consonant. AN is usually used to introduce singular nouns that begin with a vowel. In this sentence, we are talking specifically about the mangoes that were bought yesterday. Hence, we use the definite article 'the'.