In 1969, Chacha Chaudhary and Sabu, a duo who combined brain and brawn to fight the injustice in society, was unleashed onto comic land by Pran, first as a cartoon strip produced by Mayapuri Group's magazine, LotPot. In his first comic, Chacha Chaudhary and the Pocket Thief (1971), the unlikely hero was depicted as an elderly rural man. Chacha Chaudhary was later adopted by Diamond Comics and released as a comic book in 1981, a change of ownership that also led to him being transformed into a respectable urban man whose role was to teach family, cultural and national values to the younger generation. His movement from the village to the town paralleled urbanising trend in India along with increasing migration from rural sectors. Accordingly, Chacha Chaudhary and his coterie took on the moral dilemmas and criminal dangers of urban settings from the 1980s. Although the places did not acquire a high-rise and fast-paced metropolitan ambience until the rise of superhero comics later in the decade. Chacha is a man with a snow white six inch wide moustache. He is dressed in a white shirt, black Jodhpuri waist coat and a traditional red turban. His loyal companion is Sabu, a good natured 15 foot tall power pack. The friendly giant comes from the planet Jupiter, and was lured to stay on earth through the delicious draw of Chacha Chaudhary's wife cooking, particularly her flatbread, parantha and sweet halwa. Sabu is a hearty eater consuming up to 108 chapattis and up to 20 litres of milky lassi a day. Anytime the hulk of a man gets angry, a volcano erupts in the distance, and he would cry 'Ha-Huba', as he performs his extraordinary feat. Chacha, by contrast, solves all problems with his sharp intellect, never resorting to extreme violence or guns. At the most, physical violence consists of the irrepressible Chacha using his bamboo stick to whack an enemy, often Raaka, his powerful and scheming archenemy. Question: The pair of Chacha Chaudhary and Sabu is the synthesis of brain/wit and physical strength respectively. Their interdependence can appropriately be called —

1. symbiotic
2. synthetic
3. empathetic
4. systematic