Estimating and Costing - Engineering

Q1:

The expected out turn of brick work in cement mortar in foundation and plinth per mason per day, is

A 1.00 m3

B 1.25 m3

C 1.50 m3

D 1.75 m3

ANS:B - 1.25 m3

Mud mortar is 1.25 m3.then how it is? Explain, please.