which is Best drupal or majento.. ?

Drupento ftw!

When deciding on an open source ecommerce solution, it is important to first look at the fundamentals of your business and identify your priorities. By doing this you will avoid the needless exercise of feature comparisons and checklists and quickly conclude that one of these solutions is simply not a good fit. If content is important to how you engage with customers and sell your product and if you want to control and choose how the solution supports your business needs, Drupal + Drupal Commerce is generally the right choice.