TIROS-1 is also called TIROS-A. It was the first successful weather satellite that is low-Earth orbital. Weather satellite can be defined as a satellite which is primarily used to monitor the climate and weather of the earth.
NASA launched its first successful weather satellite named TIROS-1 or TIROS-A in the year 1960 on April 1. TIROS-1 was operated for continuous 78 days and was seen to me more successful than Vanguard 2. TIROS-1 is also the first of its series of Television Infrared Observation Satellites. Designing of TIROS-1 was the first step of NASA to determine if satellites could be useful in the study of the Earth. TIROS-1 was launched into orbit from Cape Canaveral Space Launch Complex located in the city of Florida in the United States of America. Another goal of launching the TIROS-1 was to improve satellite applications for Earth-bound decisions. the development of a meteorological satellite information system was the first priority of the TIROS-1 Program. Weather forecasting is one of the most promising applications of space-based observations. Therefore, the USA is the country which launched the first meteorological satellite, TIROS-1.
So, option B is the correct option.
Vanguard 2 was the first weather satellite to be launched by NASA in the year 1959 on February 17. Vanguard 2 was designed in order to measure cloud cover and resistance, but due to the poor axis of rotation and its elliptical orbit it could collect only a notable amount of useful data. The weather satellite to be successful in operation is TIROS-1. Therefore, it is considered as the first successful weather satellite.