Elance Exams Answers PDF file

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Which of the following is the correct operation to query a document for both 'Football' and "Reading" within the interests data collected from a profile?

db.profile.find({interests: {$in: ["Football", "Reading"] }})
db.profile.find({$or: [{interests: "Football"}, {interests: "Reading"}]})
db.profile.find({interests: "Football", interests: "Reading"})
db.profile.find({interests: {$all : ["Football", "Reading"] }})
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