Which Rakaats of all these are the most important? Islamic Fiqh -Prayers

        Which Rakaats of all these are the most                                       important?                                                                                                     

Answer: 

Of all these Sunnat-e-Muakkadah, the two Rakaats of Fajr are the most important. The importance can be gauged from the fact that some Muslim scholars describe it as "Waajib".

These Sunnats can not be offered sitting or while riding or in train in motion without any valid reason like that of Witr prayer. 

An Hadees in this respect says: do not forgo Fajr Sunnat under any circumstances even if enemy horses (forces) come pounding on you. After Fajr, the most important Sunnat are the four Sunnat of Zuhr prayer which are offered before Farz prayer. About these Sunnat a Hadees stressed: he will not attain my (Prophet's) intercession who abandons these Sunnat. After Zuhr Sunnat, the most important are the Sunnat of Maghrib prayer. 

An Hadees says: the one who offers two Rakaats (Sunnat) after obligatory prayer of Maghrib without talking to anybody, his (this) prayer is lifted up to "Illi-yeen" (a place in the seventh heaven under empyrean where the names of the believers deserving Paradise are entered and sheets of their actions are maintained) and then are the post-Zuhr's two Rakaats (Sunnat) and post-'Ieshaa's two Rakaats (Sunnat).