Assertion : atomic mass of aluminium ...

Assertion : atomic mass of aluminium is 27
Reason : an atom of aluminium is 27 times heavier than `(1)/(12 ^(th))` of the mass of the C- 12 atom .

A and R are correct . R explains the A .

A is correct , R is wrong .

A is wrong , R is correct

A and R are correct , R doesn't explains A .

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(1)/(12) of the mass of carbon 12 atom is......

1 TMC

mass of neutron

1 amu

mass of hydrogen

`6.023xx 10^(23) g `

`1.99 xx 10 ^(-23) g`

`2.00 g `

`12 g`

1 amu

`1/(12th)` of the mass of a C-12 atom

zero

both (a) and (b)