Pressure has the same dimensions as:

Correct answer: (b) Energy per unit volume

Explanation

Pressure is force per unit area:

• force has dimensions [MLT⁻²] and area [L²], so pressure = [ML⁻¹T⁻²];
• energy (work = force × distance) has dimensions [ML²T⁻²] and volume [L³], so energy per unit volume = [ML⁻¹T⁻²].

The two are the same, which is why pressure can also be read as the energy stored per unit volume of a fluid.