# Which one of the following pairs of codons is correctly matched with their function or the signal for the particular amino acid ?

$\begin {array} {1 1} (1)\;UUA,UCA - Leucine & \quad (2)\;GUU,GCU - Alanine \\ (3)\;UAG,UGA - Stop & \quad (4)\;AUG,ACG - Start / Methionine \end {array}$