Deep groove ball bearing has immense rigidity.

Explanation:
- Deep groove ball bearing: A deep groove ball bearing is a type of rolling-element bearing that consists of an inner ring, an outer ring, a set of steel balls, and a cage. It is designed to support radial and axial loads and can operate at high speeds.
- Rigidity in bearings: Rigidity refers to the ability of a bearing to resist deformation under load. It is an important characteristic as it affects the performance and accuracy of the bearing in various applications.

Point contact and low rigidity:
- Deep groove ball bearings offer point contact between the balls and the raceways. This means that only a small area of the ball comes into contact with the raceway, resulting in a point of contact.
- Point contact leads to lower rigidity compared to other types of bearings that have larger contact areas, such as cylindrical roller bearings or angular contact ball bearings.
- Due to the small contact area, deep groove ball bearings have lower resistance to deformation and are more prone to deflection under load. This can result in reduced accuracy and increased wear in certain applications.

Surface contact and line contact:
- Surface contact refers to a type of contact where a larger surface area of the ball comes into contact with the raceway. This type of contact provides more support and rigidity compared to point contact.
- Line contact refers to a type of contact where a line on the ball comes into contact with the raceway. Line contact also provides more support and rigidity compared to point contact.

Correct answer:
- The correct answer is option 'B' - No, it has point contact and hence low rigidity.
- Deep groove ball bearings have point contact between the balls and the raceways, leading to lower rigidity compared to bearings with surface or line contact.
- It is important to consider the rigidity requirements of the application when selecting a bearing to ensure optimal performance and reliability.