With reference to the radio frequency identification tags consider following statements Under t...........

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With reference to the radio-frequency identification tags, consider following statements

Under this radio waves are used to read and capture information stored on a tag attached to an object.
It does not need to be within direct line-of-sight of the reader to be tracke.
Amid Covid, Indian Railways completed its mission of fitting radio-frequency identification tags (RFID) in all the wagons which help them to know the exact position of all the wagons, locomotives and coaches.

Select the correct statement.

1&2 only

2&3 only

1&3 only

All of the above

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Explanation:

Recently, Ministry of Railways said that the Indian Railways is on a mission to RFID Tag all wagons by December 2022. It has been fitting radio-frequency identification tags (RFID) in its wagons to track them.Using RFID devices will be easier for the railways to know the exact position of all the wagons, locomotives and coaches.

About Radio-frequency identification

It is a form of wireless communication that incorporates the use of electromagnetic or electrostatic coupling in the radio frequency portion of the electromagnetic spectrum to uniquely identify an object, animal or person.
Simply, it is the use of radio waves to read and capture information stored on a tag attached to an object.
A tag can be read from up to several feet away and does not need to be within direct line-of-sight of the reader to be tracked.

Hence only statements 1&2 are correct.