Which of the following correctly creates a function that performs an update on the BB$\_$TEST$1$ table?

Question $1$ options:

CREATE OR REPLACE FUNCTION fct$\_$test$1\_$sf $($p$\_$num IN NUMBER$)$

RETURN NUMBER

IS

BEGIN

UPDATE bb$\_$test$1$

SET col$1=$ p$\_$num;

RETURN p$\_$num;

END;

CREATE OR REPLACE FUNCTION fct$\_$test$1\_$sf $($p$\_$num$)$

RETURN NUMBER

IS

BEGIN

UPDATE bb$\_$test$1$

RETURN p$\_$num;

END;

CREATE OR REPLACE FUNCTION fct$\_$test$1\_$sf $($p$\_$num IN NUMBER$(6))$

RETURN NUMBER

IS

BEGIN

UPDATE bb$\_$test$1$

SET col$1=$ p$\_$num;

RETURN p$\_$num

END