(Reuters) – European shares were flat on Tuesday, as a sell-off in basic resources partially offset gains in healthcare stocks, while investors awaited more economic data to assess the European Central Bank’s monetary policy trajectory for the year. The pan-European STOXX 600 held its ground at 478.24 points, as of 0820 GMT. Healthcare stocks climbed 0.6%, lifted by a 2.7% jump in ArgenX. Basic resources lost 0.5%, tracking lacklustre prices of base metals. [MET/L] Weighing on sentiment, German industrial production unexpectedly fell in November from prior month, marking the sixth monthly decl…