The correct answer is option 3: Kourou.

To dissect the options, let`s analyze each one:

Option 1: Baikaour. This is a misspelling of the spaceport in Kazakhstan called Baikonur. It is widely known as the primary space launch facility by Russia for sending satellites and manned missions into space. However, INSAT-4B was not launched from Baikonur.

Option 2: Cape Canaveral. This is a popular spaceport located in Florida, USA. It is known for being the site where NASA launches many of its missions, including the Apollo moon missions and the Space Shuttle program. However, INSAT-4B was not launched from Cape Canaveral.

Option 3: Kourou. This is the correct answer. Kourou is the spaceport located in French Guiana, a French overseas territory. It is the main base for launching satellites by the European Space Agency (ESA). INSAT-4B was indeed launched from Kourou in March 2007.

Option 4: Sriharikota. This is the spaceport in India, operated by the Indian Space Research Organisation (ISRO). While Sriharikota has been the launch site for several Indian satellites