Seven marketing managers - A, B, C, D, E, F and H visit market on four days - Tuesday, Wednesday, Friday and Saturday in a week. At least one manager but not more than two managers visit in the market on each of these days. Each of them belongs to different Telecom companies - Vodafone; Reliance, BSNL, MTNL, Uninor, Airtel and Idea. D visits on Friday and belongs to MTNL company. The person who belongs to BSNL neither visits on the day. Uninor's manager visits nor with E and H. F belongs to Idea and visits alone on Tuesday. B visits on Wednesday and he does not belong to BSNL. C visits on Wednesday, H does not belong to Airtel. The pet bun who belongs to BSNL visit with the person who belongs to Vodafone. The person who belongs to Airtel visits on Friday. 'A' visits on Saturday and belongs to Uninor.
On which day MTNL manager and Airtel manager visit?