Apart from the satellite “SARAL” ISRO Launched six more Satellites on 25-2-2013 from Sriharikota belonging to some other countries whose number is

The correct answer is B, four. On 25 February 2013, PSLV-C20 carried SARAL, the Satellite with ARgos and ALtiKa, a joint mission of ISRO and France's CNES, along with six co-passenger satellites built abroad. Those six came from four countries, which include Algeria (AlSat-2B), the UK (STRaND-1), and Germany, with the remaining satellites from the United States. The question asks for the number of countries, not the number of satellites, and that is where the count of four comes from.

• Option A (3): Too few. It undercounts the foreign nations in the co-passenger manifest.
• Option C (5): Confuses countries with satellites. Several satellites came from the same country, so the country count is lower than the satellite count.
• Option D (6): This is the number of satellites, not countries. The question specifically asks for countries.

The concept is the PSLV multiple-satellite (co-passenger) launch capability, which India uses commercially and which ties into the space sector and international cooperation topics in the Science and Technology syllabus. For Mains, it is a good example of how India's space programme has moved from purely national missions to commercial and joint launches.

Trap: Aspirants often pick 6 because it matches the number of satellites in the news reports. Read whether the question asks for satellites or countries.