** Shares of BHP Group BHP.AX rise as much as 1.1% to
A$49.960 - set to mark best day since Jan 19, if gains hold
** Stock hits highest level since Jan 20
** The world's largest listed miner says signed a deal with
Canada's Mundoro Capital MUN.V to explore copper in Serbia
** Agreement offers BHP option to take a stake in three
exploration areas that Mundoro holds in Serbia's Timok mining
region
** BHP up 8.3% this year, as of last close, after rising
23.5% in 2022
(Reporting by Nausheen Thusoo in Bengaluru)
((Nausheen.Thusoo@thomsonreuters.com;))