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6 - You have received a task to prepare a PL / SQL function to check if aparticular user _ id is already registered. It

$6 -$ You have received a task to prepare a PL $/$ SQL function to check if aparticular user $_$ id is already registered. It will be called from an SQLstatement. Which RETURN statements can be used to indicate that auser is registered?

A $.$ RETURN TRUERE

B $.$ TURN 'TRUE'

C $.$ RETURN O

D $.$ RETURN $1$

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