আমি তাকে পড়তে শুনলাম।

Explanation:

Correct Answer is: I heard him reading
• Hear somebody/something doing something:
– I heard him reading.
– Jenny could hear them arguing outside.

• Hear somebody do something:
– She heard Tom go upstairs.
– Did you hear him go out?

অর্থাৎ বোঝা যাচ্ছে Hear somebody doing something এর পর verb + ing বসে।
তাই প্রদত্ত বাক্যের সঠিক অনুবাদ হচ্ছে I heard him reading.