\vec{F} is a vector field <P(x,y,z), Q(x,y,z), R(x,y,z)
f is a scalar field f(x,y,z)

Vector, Scalar or Nonsense?
a. curl F
b. grad f
c. curl(grad f)
d. grad F

Answers
a. vector
b. vector
c. vector
d. nonsense