** Oil-related stocks strong across the board after oilprices jumped more than 5 pct Monday
** Oil-price rise came as traders reassessed how quicklyIran might increase exports after a preliminary nuclear deal &anticipated that a months-long rise in U.S. crude inventoriesmay be slowing
** Stoxx 600 Oil & Gas index up 2.6 pct, standoutperformer across Europe
** Plays catch-up with gains seen from energy stocks on WallStreet (US markets open Mon when Europe closed forEaster holidays)
** Sector advance comes even in face of dip in Brent crudeoil on Tues (RM: tricia.wright1.thomsonreuters.com@reuters.net)