Attar
According to Wikipedia, ‘the word ‘attar’, ‘ittar’ or ‘itra’ believed to have been derived from the Persian word itir, meaning ‘perfume’, which is also believed to be derived from Arabic word itr. Types of Attar Attars are classified based on their effect on the human body such as

Warm Attar: Musk, Amber, Kesar(saffron) are used in winter
Cool attar: Rose, jasmine, RUH khus, kewda, and mogra are used in summer
Top 10 Best Attar in kannauj
This is very subjective but what we can do is give you the list of top 10 best attar in India according to our preference. Here is it in ascending order of price,
BUY ATTAR FROM KANNAUJ - WORLD MOST PRECIOUS ATTAR'S
Ruh Khus BUY FROM KANNAUJ
Musk Amber BUY FROM KANNAUJ
Hina Attar BUY FROM KANNAUJ
Mitti Attar BUY FROM KANNAUJ
Sandal attar BUY FROM KANNAUJ
Shamama attar BUY FROM KANNAUJ
Mukhallat Attar BUY FROM KANNAUJ
Kashmiri Oud BUY FROM KANNAUJ
Night Queen ATTAR (Raat Rani) BUY FROM KANNAUJ
Motia Atta BUY FROM KANNAUJ