Final answer:
The sentence can be rewritten as 'Doctor Sen conducted a careful examination of Nilanjana' using 'careful', the adjective form of 'carefully'
Step-by-step explanation:
The sentence 'Doctor Sen examined Nilanjana carefully' can be rewritten using the adjective form of 'carefully' as follows: 'Doctor Sen conducted a careful examination of Nilanjana'. Here, 'careful' is the adjective form of 'carefully', which describes the nature or type of examination conducted by Doctor Sen.
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