Larsen & Toubro Limited, India's biggest builder of power plants and roads, has selected advisers to prepare an initial public offering of 10 billion rupees or $150 million for its ancillary L&T Technology Services Limited, said ones with knowledge of the matter. The conglomerate based in Mumbai is working with Kotak Mahindra Bank Limited, JM Financial Ltd. and Bank of America Corp. on the engineering services unit's listing, according to the people, who asked not to be named be