To solve the question, we need to match the descriptions of joints in Group I with their corresponding figures in Group II based on their visual characteristics and typical joint structures.

1. Butt Joint (P): A butt joint is a simple joining of two pieces of material end to end. It is one of the most basic and commonly used joints. The pieces are joined without overlapping and are usually fastened by welding, gluing, or using fasteners.
2. Rebated Joint (Q): A rebate joint involves cutting a recess in one piece to accommodate the edge of another piece. This joint provides a large gluing area, and the stepped cuts can increase the joint's strength.
3. Table Joint (R): A table joint typically refers to a more complex or decorative joining method, often involving specialized shapes or interlocking features.
4. Tongue & Groove Joint (S): This joint involves one piece having a protruding 'tongue', which fits into a corresponding groove in the other piece. It is used commonly in flooring and paneling for a secure fit.

By analyzing the figures:

• Figure 3 appears to be a simple end-to-end joint, suggesting it is a Butt Joint.
• Figure 4 shows a step cut, typically associated with a Rebated Joint.
• Figure 1 displays an interlocking arrangement that could suit a Table Joint.
• Figure 2 shows a tongue fitting into a groove, indicating a Tongue & Groove Joint.

Thus, the correct matches are:

• P (Butt Joint) - 3
• Q (Rebated Joint) - 4
• R (Table Joint) - 1
• S (Tongue & Groove Joint) - 2

Therefore, the correct answer is: P-3, Q-4, R-1, S-2.