Some words are negative in meaning, example- hardly, scarcely, seldom, rarely, barely, etc. Hence, they take positive question tag. Hence, option (D) is the correct answer.

Replace isn't it by haven’t you. Hence, option (C) is the correct answer.

Replace Isn’t it by doesn't he. Hence, option (C) is the correct answer.

Use ‘would have helped’ instead of ‘would help’. Hence, option (C) is the correc answer.

Replace 'renovate' by renovated. Hence, option (B) is the correct answer.

Replace 'should' by would. Hence, option (B) is the correct answer.

Replace ‘five hundred rupees note ’ with ‘five hundred rupee note ’. Numerical words like hundred, lakh etc are not used in plural form when there is a number before it and a noun after it. Hence, option (C) is the correct answer.

Replace 'Three lakhs of people' by 'Three lakh of people'. Numerical words like hundred, lakh etc are not used in plural form when there is a number before it and a noun after it. Hence, option (B) is the correct answer.

Replace 'The police has issued' by 'The police have issued' because police is plural. Hence option (A) is correct.

Replace 'were' by 'was'. Hence, option (A) is the correct answer.