If the curves of the posterior knees are not accurately positioned just above the bend of the "axial viewer" for a tangential knee projection (Merchant method), the

1. patellae may be projected into the patellofemoral joint spaces.
2. tibial tuberosities may be demonstrated within the joint spaces.
3. soft tissue from the anterior thighs is projected into the joint spaces.
4. knees are flexed more or less than 45 degrees.
a. 1 and 4 only
b. 1 and 2 only
c. 2 and 3 only
d. 1, 2, and 4 only

D