Which mRNA is translated fully?
AUG GUG UUG UCC UGA UGG UAU
AUG UUC UGG UAA UAU UAU
AUG UAU UUC UGC CUG GUU
AUG AGG UAU UUC UGA UAA
AUG UAU UUC UGC CUG GUU sequence will be transcribed fully because there is no any stop codon.
Hence, the correct answer is option 3.