The Coalition Government formed by the National Front was not joined by:

BJP & The Left Front

The correct answer is Option 3: BJP & The Left Front

The Coalition Government formed by the National Front was not joined by BJP & The Left Front.

The National Front (which itself was an alliance of Janata Dal and some other regional parties) received support from two diametrically opposite political groups: the BJP and the Left Front. On this basis, the National Front formed a coalition government, but the BJP and the Left Front did not join in this government.

Note: This is the answer as per NTA. However, multiple options are correct for this question. Option1 (congress) can also be answer to this question as it also did not join the National front Government.