Concept:
Synovial joints are freely movable joints that allow different types of body movements. Common types of synovial joints include:
• Hinge joint
• Saddle joint
• Pivot joint
• Ball and socket joint
• Condyloid joint
Fibrous joints are immovable joints and irregular joint is not a standard synovial joint classification.
Step 1: Identify the valid synovial joints.
Among the given options:
\[
\text{Hinge Joint, Saddle Joint, and Pivot Joint}
\]
are recognized types of synovial joints.
Step 2: Eliminate incorrect options.
• Fibrous joints are immovable joints.
• Irregular joint is not a standard classification of synovial joints.
Step 3: Choose the correct combination.
Thus, the correct set is:
\[
A, B, D
\]
Hence, the correct answer is:
\[
\boxed{(B)\ A, B, D\ \text{only}}
\]