Progressive decline of cognitive functions of the human brain associated with gradual death of neurons is a more general condition named dementia. Prominent symptoms of dementia are loss of memory, mood changes, and problems with communication and reasoning. AD is the most common form of dementia contributing to \(60-70\%\) of cases \cite{who2015}. It primarily affects the aging population and the risk increases with age. The increment of longevity in most parts of the world due to the advancement of medical science and consequently better health care can cause a significant rise in the incidence of AD in coming years. Thus, it is imperative to improve our understanding of AD to alleviate the growing socio-economic impact of AD in the world.