** Petronet LNG Ltd rises as much as 4.6 pct to highest since April 21
** Co's March-qtr profit jumped 92 pct to 4.71 bln rupees ($72.83 million), tops analysts' average estimate of 3.92 bln rupees bit.ly/2qptuwK
** Petronet recommends 50 pct dividend for FY ended March vs 25 pct year earlier bit.ly/2qpJPBX
** Says to issue bonus shares in 1:1 ratio
** Morgan Stanely analysts point to a steady growth, say Petronet delivered "positive surprise on volumes, indicating stable LNG demand in the country"
** Stock posts biggest intraday pct gain since April 12 ($1 = 64.6690 Indian rupees)