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What does the following query do when performed on the posts collection?

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What does the following query do when performed on the posts collection? db.posts.update({_id:l},{Title:This is post with ID 1"})

A.

Syntax error

B.

Replaces the complete document with _id as 1 with the document specified in second parameter

C.

Updates the Title of the post

D.

Updating a document is possible only with $set

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