The correct answer is B. Larsen and Toubro.
Larsen and Toubro is an Indian multinational engineering, manufacturing, and construction conglomerate headquartered in Mumbai, Maharashtra. It is the largest engineering conglomerate in India and among the top 100 companies in the world by revenue. The company was founded in 1938 by G. D. Birla and K. M. Birla.
Ranbaxy Laboratories is an Indian multinational pharmaceutical company headquartered in Gurgaon, Haryana. It is the largest pharmaceutical company in India by revenue and market capitalization. The company was founded in 1937 by Ranbaxy Lal Bahadur Singh.
Morepen Laboratories is an Indian multinational pharmaceutical company headquartered in Hyderabad, Telangana. It is the second largest pharmaceutical company in India by revenue after Ranbaxy Laboratories. The company was founded in 1963 by K. K. Modi.
Torrent Pharmaceuticals is an Indian multinational pharmaceutical company headquartered in Ahmedabad, Gujarat. It is the third largest pharmaceutical company in India by revenue after Ranbaxy Laboratories and Morepen Laboratories. The company was founded in 1963 by Sudhir Mehta.
Dr. Reddy’s Laboratories is an Indian multinational pharmaceutical company headquartered in Hyderabad, Telangana. It is the fourth largest pharmaceutical company in India by revenue after Ranbaxy Laboratories, Morepen Laboratories, and Torrent Pharmaceuticals. The company was founded in 1984 by Anji Reddy.
As you can see, Larsen and Toubro is not a pharmaceutical company. It is an engineering, manufacturing, and construction conglomerate.