Google is the most trusted online brand in the country,with Facebook coming in at number two,says a study by Brand Trust Advisory. Yahoo has emerged as the second-most trusted search engine after Google,says the report. The survey was conducted in 16 cities,taking into consideration 19,000 unique brands across 211 categories,Trust Research Advisory chief executive N Chandramouli said. Social networking sites are gaining popularity,with Orkut and Twitter ranking fourth and sixth respectively overall. Google's Orkut,steadied at fourth rank despite a significant fall in daily visitors from here. Facebook has ranked first in the sub-category of social networking, he said. The fifth slot has gone to shopping portal eBay,which tops in the list of e-commerce brands followed by AOL,Amazon,Ibibo and OLX.in. YouTube,which ranks ninth,leads the sub-category of online sharing portals,while Naukri managee the 24th position overall.