What sensors should I use to make 3-in-1 clinical thermometer?

I would like to make 3-in-1 thermometer for my fyp..........ear, forehead and armpit

Melexis 90614 (forehead) TS318-5C50 (ear)

I don't know whether this 2 sensor are suitable or not..... I also don't know what ntc thermistor(armpit) to be used I need a very accurate reading for this 3 type thermometer, because have to compare with thermometer in the market or someone has a better suggestion........

Thanks

How accurate ? 0.5 or 0.1 or 0.01 degrees ? Do you prefer Celsius or Fahrenheit ?

I prefer degree Celsius.......