What is the normal temperature of the human body? How is it indicated in a clinical thermometer?

Can a clinical thermometer be used to measure the temperature of boiling water ? Give reason for your answer.

Name the S.I. unit of area and define it.

How are the units (i) square yard (ii) hectare (iii) km² (iv) cm² (v) mm² related to the S.I. unit of area?