Use reasoning to lead to the answer of the following question:
' Tilak Nagar, named after freedom fighter Bal Gangadhar Tilak; is a suburban area and commercial hub in district of West Delhi, Delhi, India.\n\nAnswer this question: tilak nagar is in which zone of delhi?

West Delhi
This is the relevant information: ' Tilak Nagar, named after freedom fighter Bal Gangadhar Tilak; is a suburban area and commercial hub in district of West Delhi, Delhi, India.

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The final answer: West Delhi