He was best known for illustrating ‘Vikram-Betal’ series Chennai: Legendary artist K.C. Sivasankar, known for illustrating for children’s magazine Chandamama, also known as Ambulimama, passed away at his residence in Chennai on Sept. 29. He was 97.  Sivasankar, who has contributed to the field of art for over 60 years, was best known for illustrating…