Correct Answer: Option B
a.zero conditional sentence
b.first conditional sentence
c.second conditional sentence এবং
d.third conditional sentence.
*if এর পর past tense থাকলে তা second conditional sentence.
✿structure -- If+past+would/could/might+verb এর present form
structure অনুসারে শূন্যস্থানেwould buy বসবে।
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