Which of the following are included in first class levers?
A1, 2 and 4 only
B1 and 2 only
C3 and 4 only
D1, 3 and 4 only
Which of the following are included in first class levers?
A1, 2 and 4 only
B1 and 2 only
C3 and 4 only
D1, 3 and 4 only