unitless quantity (a) never has a nonzero dimension, (b) always has a nonzero dimension, (c) may have a nonzero dimension, (d) does not exist.

Question

A unitless quantity

(a) never has a nonzero dimension,

(b) always has a nonzero dimension,

(c) may have a nonzero dimension,

(d) does not exist.

Answer 1

(a) never has a nonzero dimension,

Explanation:

A unitless quantity never has a non-zero dimension.