Choose the correct replacement of the underlined portion of the sentence. Had you walked fast, youwould not missthe train.

• 3rd Conditional এর নিয়মানুযায়ী, 
- Had + Subject + verb এর past participle form হলে এরপরের অংশে Subject + would/could/might + have + verb এর past participle form + ext হয়। 
- যেহেতু প্রশ্নে উল্লেখিত বাক্যের দ্বিতীয় অংশে Had it not been for your help আছে, তাই নিয়মানুযায়ী ' would not miss' এর correct replacement হবে - 'would not have missed'
- সম্পুর্ন বাক্য - Had you walked fast, you would not have missed the train.