Which one of the following tests used for the identification of functional groups in organic compounds does not use copper reagent?

Which of the following statements is correct?

Assign "$T$" for a true statement and "$F$" for a false statement,then select the correct option.
$(i)$ Most naturally occurring amino acids have $L$-configuration.
$(ii)$ $\beta-D$-ribose sugar is present in $RNA$.
$(iii)$ Amylose is a water-insoluble component made up of $\alpha-D^+$-glucose units.
$(iv)$ All monosaccharides are non-reducing sugars.

Pick out the wrong combination.

Which of the following is the most important biological molecule containing $Mg$ found in living organisms?

Assertion : $Mg$ is not present in the enamel of human teeth.
Reason : $Mg$ is an essential element for the biological functions of humans.