He is engaged... writing a book.

A In

B with

C to

D at

Solution

Correct Answer: Option A

• 'কোন কিছুতে নিয়োজিত/ ব্যস্ত থাকা' অর্থে preposition হিসেবে in বসে।
• He is engaged in writing a book- সে বই লেখায় ব্যস্ত। 

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