What is the value of json in the following code? var days = {}; days['Monday'] = true; days['Wednesday'] = true; days['Sunday'] = false; var json = JSON.stringify({x: days});( )
{"x":{"Monday":true,"Wednesday":true,"Sunday":false}}
{"day":{"Monday":"true","Wednesday":"true","Sunday":"false"}}
{"day":{"Monday":true,"Wednesday":true,"Sunday":false}}
{"x":["Monday":true,"Wednesday":true,"Sunday":false]}