Read the following to give the correct answer.
1.
| Assertion (A): | A convex lens can be used to burn a piece of paper. |
| Reason (R): | A convex lens converges parallel rays of sunlight at a single point called the focus. |
2.
| Assertion (A): | A convex lens can form both erect and inverted images. |
| Reason (R): | The nature of the image formed by a convex lens depends on the distance of the object from the lens. |