Answer:
B
Step-by-step explanation:
It's 1 1/4 because 1/2 is two quarters and 3/4 is three quarters;so if you take one of the quarters in 1/2 and add it to the 3/4, it will give you 1 and so you have 1/4 left from the 1/2 and summing it up will give you 1 1/4