Feb 5 - Fitch Ratings has assigned a 'BBB+' rating to Selective Insurance Group's (Selective) $175 million 5.875% senior note issuance due 2043. The Rating Outlook for all ratings is Stable. A complete list of ratings is provided at the end of this release. Selective has granted the underwriters the option to purchase up to an additional $25 million of Senior Notes within 30 days to cover over-allotments which could bring the total issuance of the senior notes to $200 million. The new issue