Q. . . . . . . . . amazing thing happened to us yesterday.
✅ Correct Answer: (B)
an
Explanation: 'Amazing thing' is general not something specific. 'An' article will be used because 'amazing' begins with a vowel sound.
Explanation by: Mr. Dubey
'Amazing thing' is general not something specific. 'An' article will be used because 'amazing' begins with a vowel sound.