I'm an ECE student in 6th sem, I'm interested in embedded, computer networks and web development, what is the best career option to start with?

Both embedded and Web development are best for you career.

Now the choice is ours if you want to enroll your career in IT you can go ahead with Web Development. In web development learn Photoshop,HTML 5,CSS3,PHP, CMS(Wordpress,Joomla,Drupal,Magento)

If you already interested in Embedded you can move to embedded also

But now the openings for embedded is very low so i suggest you to go ahead with Web Development only