Correct option is D
Design Limitation:
Straight cylindrical roller bearings have flat rollers parallel to the axis, making them ideal for radial loads only.
They cannot handle axial (thrust) loads because the rollers are not angled, and there is no provision to counteract axial forces.
Comparison with Other Bearings:
Deep Groove Ball Bearing: Handles moderate axial loads due to curved raceways.
Angular Contact Ball Bearing: Designed specifically for combined radial + axial loads (contact angle > 0°).
Tapered Roller Bearing: Excels at axial/radial loads due to conical rollers and raceways.
