Which of the following words is a 'Tatsam' word (direct Sanskrit loanword)?

'Agra' (अग्र) is a pure Sanskrit word (Tatsam) meaning ahead or front. Its corresponding Tadbhav form is 'Aage'. The other choices are Tadbhav words derived from Sanskrit roots (Adya $\to$ Aaj, Agni $\to$ Aag, Akshi $\to$ Aankh).