In the following question, the given sentence has four parts marked P, Q, R and S. Choose the part of sentence with the error and mark as your answer. If there is no error, mark 'No error (S) ' as your answer.
We have issued (P) / a order seeking immediate (Q) / printing of revised price tag. (R) / No
error (S)

Correct option is B

Option (b) contains an error.
Explanation: The phrase "a order" is incorrect because "order" starts with a vowel sound, and the correct article should be "an" instead of "a."
Grammatical rule used: The article "an" is used before words that begin with a vowel sound (a, e, i, o, u). "Order" begins with the vowel sound "o," so "an" must be used instead of "a."
Example: Correct: She gave me an umbrella.
Incorrect: She gave me a umbrella.