The part of sequence of RNA coding for a protein and it's mutated sequence is given below.

Normal sequence : AGC- GCC- GAA- AGA- AAG- AUG- ACG
Mutated sequence : AGC- GCC- GAA- UGA- AAG- AUG- ACG

Type of mutation shown above is
Missense mutation
Nonsense mutation
Silent mutation
Frame shift mutation
AGA is mutated to UGA (Adenine is replaced by Uracil) Coding region is converted to Stop Codon. So it is a Nonsense point mutation.