Question

dimensionless quantity has.............
a) always unit
b) never unit
c)may be have unit
d)does not exist​

Answer 1

b) does not have unit

hope this helps you

Answer 2

Answer:

//May have a unit//

Generally dimensionless quantities don't have units, but in some cases, very rarely, they do have units

Eg- angle is dimensionless as

Theta =length of arc by radius

So unit will be nil, as it's a ratio,but it has a unit of radian or degree