I am a resident of Bengaluru, and I will be visiting China to deliver a lecture at a conference.

I am a resident of Bengaluru and I will be visiting China in May 2013 to deliver a lecture at a conference. The invitation could allow me a 'F Category Visa' (Business). My questions are:

1. I will be in Delhi for the next few weeks (though I am resident of bengaluru), so will I be allowed to apply from delhi?
2. Can one apply for a 'F' via an agent/agency?

Hoping for a reply.
With thanks,
Dr Swaroop Revannasiddaiah