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The first gene therapy patient was a girl aged:

AFour
BNine
CFive
DSeven
Answer & Solution
Correct answer: A. Four
1. She had an inherited enzyme deficiency. 2. The therapy was given to a 4-year old girl. 3. So the correct answer is four. _Source: NCERT Class 12 Biology, Ch 12 'Biotechnology and its Applications'_
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