Question

Q4= The unit of mass in S.I. unit is?
a. kilogram
b. gram
c. tonne
d. quintal
e. newton

Answer 1

This was something you had to post a question on? Surely your text discussed the units.

then there's always google.

Answer 2

thanks a lot @bobpursley

Answer 3

thank u sir(°_^) for.... steve