Question

What type of bomb was used in Oklahoma City bombing of 1995

Answer 1

4,800 pounds (2,200 kg) of ammonium nitrate fertilizer, nitromethane, and diesel fuel mixture.

Answer 2

Actually, it wasn't really a specific type of bomb, but in fact, it was a mixture of very powerful ingredients. 
It was a mixture of ammonium nitrate, fertilizer, nitromethane, and diesel fuel. In fact, it was 4,800 pounds of this mixture jam-packed into a truck and detonated right in front of the Alfred P. Murrah Federal Building, which was 9 stories tall.