What could be the possible answer among the following for compressive strength of high strength concrete?

Concrete having 28-days compressive strength in the range of 100 to 150 MPa.

What is the range of water in M10?

Water cement ratio is __

____________ mm nominal maximum size aggregates gives optimum strength.

Gel/Space ratio = x = Volume of gel / Space available = 0.657 C / 0.319 C+ Wo. Here Wo stands for?

For concrete exposed to a very aggressive environment the w/c should be lower than _____

What could be the possible answer among the following for water cement ratio for high strength concrete?