Which was the first petrochemical company in India?

Padma Bhushan awardee, Alarmel Velli, who is renowned for Bharatanatyam, is also an exponent of which of the following dance forms?

Aruna Sairam, T M Krishna and Gayathri Girish are associated with which form of music?

Kathak is found in three distinct forms, called ‘gharanas’, named after the cities where the Kathak dance tradition evolved. Name those three cities.