Which is the initiation codon for protein synthesis in eukaryotes?

Which of the following anticodons is not possible?

Complete the following table regarding the genetic code,amino acids,and anticodons:

Genetic Code	Amino Acid	Anticodon
$a$	$Met$	$b$
$GGA$	$c$	$d$
$UUA$	$e$	$f$
$g$	$h$	$ACA$

Which of the following group of codons is called stop codons?

For leucine (leu) which codes are correct?

There is only one possible sequence of amino acids when deduced from a given nucleotide sequence. However,multiple nucleotide sequences can be deduced from a single amino acid sequence. Explain this phenomenon.