Which is the tag question of the following sentence? 'Nothing should go unchallenged.'

A is it?

B isn't it?

C should it?

D do it?

Correct Answer: Option C

- Tag question এর শুরুতে nothing থাকলে এর পরিবর্তে it বসে এবং verbটি positive হয়।
- অর্থাৎ বাক্যটির সঠিক question tag হচ্ছে should it.