Q3: Name the companies X & Y and the founders M and S

3.      The brothers made a killing selling their 34% stake in generics maker Ranbaxy Laboratories to Japan's Daiichi Sankyo for $2 billion last year; stock down 47% since. Older brother “M” continued as chairman and chief executive for several months but stepped down in May, ending family's 48-year reign at company founded by their grandfather. Cash-rich brothers are expanding their interests in healthcare and financial services. In August, their hospital chain “X”, looked after by “S”, struck deal to buy 10 hospitals for $196 million from beleaguered pharma tycoon Habil Khorakiwala. Financial arm “Y” has joint ventures with Dutch insurer Aegon for life insurance and with Australia's Macquarie Group for wealth management services. Scouting for a new partner in health insurance after proposed joint venture with Swiss Re fell through. Name the brothers M and S and the two companies X and Y
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M stands for Malvinder Singh, S for Shivinder Singh, X for Fortis Healthcare and Y for Religare